Epson Portable Calc ROM chips in case
||M25040CA written on ROM #1
||M25044CA written after the word English on ROM #2
1/2 x 2 1/8 x 2 1/8 in.
Custom plastic carrier for two ROM chips containing: 1. ROM #1 BASIC 2. ROM #2 Portable Calc. Used with Epson PX-8 portable computer.