Keuffel and Esser Favorite Slide Rule, K & E 1950s Model N4058W Quincy_MA_gift The adorable begging pup measures

The adorable begging pup measures approx

Labeled National Potteries Co

The pin is made of a darker metal

It probably helped the divers stay under the water

The glasses are in good antique condition with some wear and tear at the larger lenses

Keuffel and Esser Favorite Slide Rule, K & E 1950s Model N4058W Quincy_MA_gift The adorable begging pup measuresThis is a vintage Keuffel and Esser Beginner's Slide Rule, model 4058W. Manufactured from 1950's, the 10" Mannheim type slide rule was constructed on a wood frame with a celluloid overlay laminated ruled surface with a plastic curser. The rule is in vintage condition with edge wear and finish wear. The cursor is still clear with minimal scratches. Include case which is worn and torn, as found, doesn't fully fit the ruler, likely not original. I'll