This round slide rule is marked IWA and comes in it’s complete leder case. Made in Germany for the use with the Lockhead F104-G starfighter and used by the Bundeswehr from 1965 – 1975 (only 900 planes). This is a rare military model in good working condition with minimal signs of use and age. Fully functioning. It measures ca 13 cm or 5 1/4 inches in diameter. Check the attached video on how to work your vintage man tool : aviation slide rule operation instructions!
IWA 15106 circular slide rule TF 104 1965 Germany
IWA 15106 flight computer circular slide rule TF 104 made ca. 1965 in Germany
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