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We have for sale an Antique 1920s Interlox Master Slide Rule
Amazing 72-inch wooden slide rule made by the Master Rule Manufacturing Company of New York. This is a wonderful rule which measures inside dimension on one side outside dimension on the other side, very clever. It has 12 sections all measuring 8 inches, there is a metal button on each section you push to unlock and slide out each section. Invented by Albert Dahl.
We show a picture of an advertisement from 1919 for this rule.
Circa, 1920s
Marked, Interlox Master Slide Rule
Measures, 72” long, 8” per section.
Condition, Good, please see all pictures.
To see more of our wonderful Antique and Vintage Industrial, Railroad and Tools click the link below to go to our Etsy store.
https://www.riverratantiques.com/shop/14679344/industrial-railroad-tool
Sku# 4664
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Feb 4, 2021
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