This is a Pickett Model N902-T Simplex Trig Slide Rule, perfect for engineers and math enthusiasts. 
Made in the United States, this slide rule has a time period of manufacture from 1930 to now and has not been modified. 
It is a great addition to any collection and can be used for accurate calculations in science and medicine. 
Get your hands on this collectible piece and experience the precision of a slide rule.

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