Company Name & Address:

               Tetrectys (Olivetti)

Estimated Price Range:    $1.-$2.

Dimensions:   1 7/8″ x 3 3/8″

Colors:  Gr/Bk

Weight:    ——————-

Picture Credit:  HDVD

Description: Green see through plastic shield picturing, I believe a printing calculator introduced by Olivetti in 1958.