Two vintage trig slide rules!!

Pickett simplex trig slide rule model N905-ES 10 inch.

Sterling model no594

Both come in protective case. Sterling case has been taped up.

Includes original papers for Pickett. Including a how to use manual by Maurice L Hartung. University of Chicago.

Does have a few personal notes handwritten inside from previous owner.

Original Pickett V Eckel Inc box holds both rules.

Atomic style logo on box. Some pen markings on box.

Made in the USA.

Very good preowned condition.