Pickett & Eckel Vintage Slide Rule Model 1010

Model 1010 Pickett & Eckel duplex slide rule with scales on both sides. Also identified as model 271 and a trigonometry model. Made in 1948. Made from aluminum with white plastic coating and a nylon indicator. Measures 12" long and 1 and 1/4" wide. Used by Engineers and scientists for calculating complex equations. Has been in storage and is in excellent condition.