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Mannheim Slide Rule Made in 1920 by Albert Nestler No.9...
This is a rare Albert Nestler early Mannheim slide rule no.9 with...
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Almost New UNIQUE Log-Log Slide Rule With Instructions.
This 10 inch slide rule is almost new in its original box including...
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Japanese Abacus with 5 Beads in 15 Rows
A Japanese Abacus, with 5 beads in 15 rows. Abacus comes from the...
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Fowler's Universal Calculator
Fowler & Co. in Manchester made this pocket calculator during the...
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Halden Calculex Circular Slide Rule circa 1910
This is a circular side rule made of German silver and glass by...
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Fowler's Magnum Long Scale Calculator
Fowler & Co. in Manchester made this calculator during the 1930’s....
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Unique Adix Adding Machine, c.1905, Made in Germany
Adix is a relatively simple column adder for adding numbers up...
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Fowler's Circular Slide Rule Calculator Type ‘Long Scale’
Fowler & Co. in Manchester made this pocket calculator. It was...
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Polar Planimeter with adjustable arms by R. Reiss, Germany.
This special type Planimeter was made in Germany by Robert Reiss...
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Development: Epoch | Design: Luch
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