Casio S-830 Vintage Digital Watch 36x40mm Made in Japan

The module 140 is similar to the 110 (F-300, F-500) and the watch dates to the early 80's like they do. It's got the stainless steel shell over resin body construction that Casio did for a few models during that time period but, strangely enough, the watch doesn't have 'STAINLESS STEEL TOP' on the caseback like those others do. Needs battery