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SLIDE RULES & CALCULATORS.

Fowlers Magnum calculator in presentation case

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This is a quite exceptional example of a Fowler's Jubilee Magnum Extra Long Scale calculator.
Designed in 1948 by Harold Fowler to mark the 50th anniversary of the founding of the firm by his father William Henry Fowler in 1898. This particular calculator comes in a special presentation case which suggests it was one of the first models made in 1948, probably for promotional distribution.
This was the largest circular calculator made by Fowler's measuring 12cm in diameter, and it has a 79" long scale extending over ten circles.
In full working order, with a black hammer finish steel backplate and a bright nickel outer body, the condition of the calculator and its velvet lined fitted case is near mint. Its doubtful that there are many of these presentation sets left, let alone in such fine condition (the photos don't do it justice!).

Price	Status	Code	Ship UK	Overseas
	SOLD	SC1010

Fowler's two sided circular calculator in nickel case

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A nice clean example of a Fowler's double sided Long Scale calculator, complete with its own velvet lined nickel plated case engraved 'Fowler's Calculator' on the lid.
Known also as a 'Vest pocket' model, these double sided calculators were recommended as the most comprehensive and accurate pocket calculator ever made. Measures 2 1/2" diameter and in good working order, with clean scales on both faces, it is missing its hanging ring, but this is a cosmetic flaw and does not affect its functionality in any way.
The overall condition is very good, including the nickel plated case, and comes with a photocopied 1956 set of instructions plus a copy page from an original Fowlers brochure advertising the Vest pocket calculator.

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	SOLD	SC1005

Fowlers 2 sided Long scale vest pocket calculator

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A nice clean example of a Fowler's double sided Long Scale calculator, complete with its own leather case embossed with the Fowlers name on the strap.
Known also as a 'Vest pocket' model, these double sided calculators were recommended as the most comprehensive and accurate pocket calculator ever made. Measures 2 1/2" diameter and in good working order, with clean scales on both faces.
The overall condition is very good, including the case, and comes with a photocopied 1956 set of instructions plus a copy page from an original Fowlers brochure advertising the Vest pocket calculator.

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	SOLD	SC976

Muldivo Mentor mechanical pinwheel calculator

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Nice condition Muldivo Mentor pinwheel calculator incorporating 10 digit setting register, 16 digit results register, and 8 digit revolution register, also has a back transfer mechanism.
Model WSR 160, serial no 224414, made in Germany by Walther this is a quality calculator, the pinwheel mechanism being machined from brass.
Not only a great conversation piece, but an unusual retro piece from the late 1950's which would look great on an executives desk!
In full working order, overall dimensions, 11" x 6", weight around 6kgs, overseas buyers please email for shipping costs.

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	SOLD	SC893	Free

Vintage Otis King model K cylinder calculator

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A good example of a vintage Otis King cylindrical slide rule calculator with its original box and instructions including conversion tables. This is a model 'K' serial no Y6859, with clean & legible helical scales enabling numerous mathematical calculations, all detailed in the instruction sheet supplied. Made by Carbic Limited London during the 1960's, it's in good condition and in working order.

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	SOLD	SC910

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A vintage mechanical calculator made by Atvidaberg - Facit in Sweden. The model is the C1-13, this particular design was produced between 1960 - 1964 and the serial number 799433 allows us to date it to 1961. It has a 10 digit keyboard with 8 digit counter and 13 digit accumulator.
Cosmetically there are signs of wear and tear, with some paint loss, and a small crack in the results window (see photo 4, the crack is just before the number 3). However, it is in full working order, although the tips of the plastic indicators are missing, but the slides still work and do not affect the operation of the calculator.
This is a heavy item at around 6kgs, and measures overall width 11.5" x 7.5"depth x 6" high.

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	SOLD	SC686

Fowler's Universal calculator with original instruction book

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Fowlers Universal circular calculator, with original instruction book, this is one of the rarer models with a chrome backplate. In full working order, the six scales perform numerous mathematical functions including multiplication, cube roots and and square roots. Measures 9cm diameter, all in very good condition (nice clean dial) with its original handsome leather case. Dates to around the 1950's, and comes with a photocopied page from a Fowlers advertising brochure.

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	SOLD	SC650

Nice condition Muldivo Pinwheel calculator incorporating 12 digit setting register, 18 digit results register, and 10 digit revolution register, serial no DER 160648. Similar to the Mentor in that it's fitted with a back transfer mechanism, This transfers the number in the result register, centre right, to the setting register, centre, which can be very useful in chain calculations.
Probably made by Thales in Germany this calulator is in full working order with original plastic dust cover, and dating from the late 1950's. Overall dimensions, 11" x 6", weight around 6kgs, overseas buyers please email for shipping costs.

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	SOLD	SC548

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Fowlers Magnum Textile circular calculator, measures 12cm diameter, in very good condition and in leather case which is also in fine order. Also comes with its original 42 page instruction book which although a little dog-eared is complete and perfectly useable. dating to around 1950, its becoming increasingly more difficult to find these items in such good and complete condition.

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	SOLD	SC276

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Original Odhner pinwheel mechanical calculator. Grey metal case, made in Sweden, serial no 1049 - 52417. In good condition with only minor paint loss. Dating to around 1960, these are rapidly becoming must have desktop accessories, as well as collectables. In full working order this is a heavy item weighing over 6kgs! Overseas buyers please email for cost of shipping.

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	SOLD	SC264

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This is a vintage mechanical calculator made by Atvidaberg - Facit in Sweden. The model is the NTK which was produced between 1954 - 1957, and the serial number 473672 allows us to date this particular one to 1955. It has a 10 digit keyboard with 8 digit counter and 13 digit accumulator. In very good condition and fully working, this is a heavy item at around 6kgs, and measures overall width 11.5" x 7.5"depth x 6" high. Overseas buyers please email me for shipping costs.

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	SOLD	SC294

Fowlers Twelve ten calculator in presentation case

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In excellent condition, a fully working Fowler's Twelve Ten calculator in a superb presentation box with 'The Fowler Calculator' printed in gold lettering on the lid. Known as the 12-10 because it includes scales to convert twelfths to tens, yards to metres, lbs to Kgs, inches to centimetres etc. Introduced in 1936, this particular calculator was primarily designed for Architects, Surveyors, Builders and Craftsmen, and is one of the more hard to find models, particularly in such good condition with its own special Fowlers presentation case (size 4" x 5").
Comes with a photocopied page from a Fowlers advertising brochure.

Please note the slight red hue on the black case outer is only from the flash photography, and is NOT a blemish on the case which is in excellent cosmetic condition.

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	SOLD	SC662

Brunsviga pinwheel mechanical calculator

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Brunsviga rotary pinwheel calculator, made by Olympia Werke AG Wilhelmshaven. In full working order with only minor paint loss. Has 10 digit setting register, 13 digit accumulator register, and 8 digit revolution register. 12" x 5" overall dimensions and weighs around 8 kilos
Manufactured between 1950 -1970.
Overseas buyers please email for Shipping costs.

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	SOLD	SC260

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Fowlers Universal circular calculator, with original instruction book. Measures 9cm diameter, in very good condition (nice clean dial) with its leather case, also in good condition and engraved 'Fowlers Universal Calculator, Sale'. Dates to around the 1950's.

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	SOLD	SC546

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This is a MULTO Pinwheel mechanical calculator manufactured in Sweden around the 1950s, and retailed by ADDO Ltd. London. In excellent working order, a real collectors piece. It weighs about 8 kilos. The length is about 12 inches the height about 6 inches . Overseas buyers please email for Shipping costs.

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	SOLD	SC254

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Original Odhner pinwheel mechanical calculator. Grey metal case, model no 229 serial no 4991.In super condition, still has its original plastic dust cover. Dates to around 1960, a real collectors piece in full working order. Heavy item weighs over 6kgs! Overseas buyers please email for cost of shipping.

Price	Status	Code	Ship UK	Overseas
	SOLD	SC108

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