Fowler's Circular Slide Rule Calculator Type ‘Long Scale’.
| Item# |
sci251 |
| Status |
SOLD |
| Price |
SOLD |
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Fowler's Circular Slide Rule Calculator Type ‘Long Scale’. Fowler & Co. in Manchester made this pocket calculator during the 1930’s. It was designed for engineers; draughtsman and science students with... [more info]
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Otis King Slide Rule Calculator Model 'K'.
| Item# |
sci250 |
| Status |
SOLD |
| Price |
SOLD |
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Otis King Slide Rule Calculator Model 'K'. This is a cylindrical pocket slide rule with helical scales 66 inch long to add subtract multiply and divide numbers, made in England by Carbic ltd., London in... [more info]
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Otis King Slide Rule Model 'L'.
| Item# |
sci253 |
| Status |
SOLD |
| Price |
SOLD |
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Otis King Slide Rule. Early Logarithmic Calculator Model 'L'. This is a logarithmic cylindrical pocket slide rule with helical scales to add subtract multiply and divide numbers, made in England by Carbic... [more info]
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Curta Model Type I Mechanical Calculator in Mint Condition.
| Item# |
sci301 |
| Status |
SOLD |
| Price |
SOLD |
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Curta Model Type I Mechanical Calculator in Mint Condition. This mint condition Type I model with serial number 47218 was manufactured on June 1960 in Liechtenstein by Contina Ltd. (invented by Curt Herzstark).... [more info]
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BriCal Money Calculating Machine.
| Item# |
sci321 |
| Status |
SOLD |
| Price |
SOLD |
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Early 20th Century BriCal Money Calculating Machine. This is a circular brass calculator which was Patented by H and M Dickinson. (Bri Cal -British Calaculator). Using the stylus, one rotates the chain,... [more info]
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Fuller's Calculator by WF Stanley Model 2.
| Item# |
sci318 |
| Status |
SOLD |
| Price |
SOLD |
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Fuller's Calculator by WF Stanley Model 2. 1920s Fuller's Spiral Slide Rule Calculator By W.F. Stanley. This bakelite and brass Fuller's spiral slide rule with serial number 10581-52 was made and signed... [more info]
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Early 1920s Calculating Aid For Multiplication
| Item# |
sci334 |
| Status |
SOLD |
| Price |
SOLD |
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This is a pencil-box calculator for primary school students aimed to memorize the multiplication table. It was invented and pa tented in England in 1921 and manufactured by Darnley's under the name ‘Rotatable... [more info]
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Fowler ' Magnum' Long Scale Calculator.
| Item# |
spr335 |
| Status |
SOLD |
| Price |
SOLD |
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This is a circular slide rule made Fowler's Ltd in th e1920's. The entire scale disk is rotated by turning the top knob. the second knob, rotated a second hairline (in black) while the other (red) hairline... [more info]
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