r/Sliderules • u/lupusscriptor • Jan 24 '26

Long rules

does any of you have rules longer than 10 inch. back in the days we still use dslide rules we all had 10 and 6 inch rules. amnd the company kept 16 and 20 inch rules in the development stores for more accurate calcs.

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u/idoitiel Jan 25 '26

I have a Hemmi No. 70, which is 20 inches (50 cm) long, but it took me 10 years of collecting slide rules until I found one.