Linear slide rules

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Pickett N4-ES

Pickett Model No. N4-ES Log Log Vector Hyperbolic slide rule in good working condition with the original case. The "Big Guy" of Picket slide rules. It is a Dual-Base Speed Rule. It is about 12" long.

D Scale length: 250 mm. Significant digits: 3 to 4.

Copyright 2012, Dave Hoyer.