This round slider rule is marked ALRO 1010, comes in it’s complete metal case. Made in Holland in The Hague around 1950 after the patents were received, for this unique and special model, called “Commercial”. Colorful model in good working condition with signs of use and age. Fully functioning, small dent in top part, some wear to decal on the inside lid. Closed it measures ca 13,5 cm or 5 3/8 inches wide. See pictures for details. Check the attached video on how to work your vintage man tool : slide rule operation instructions! Do read the article on ALRO slide rules from Holland while you are here.
Alro 1010 Commercial slide rule metal case 1950 Holland
€85.00
ALRO 1010 Commercial circular Slide rule in metal case made ca. 1950 in Holland
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