This is by far the nicest CFX-200 I've had.
One of the most complicated modules ever made. Able to perform scientific mathematical functions that only a handheld calculator could in 1983.

The ultimate geek watch. It doesn't get any more retro than this.
All functions work. Light and alarm work.
Vintage 1983 Casio CFX-200 Scientific calculator watch. Module 197. Performs 25 scientific functions such as: SIN, COS, TAN, LOG, conversions (pounds to kiligrams, inch to mm... ). Alarm works and is loud. Backlight works. Oh, and it tells time too. Good used condition. Scatches, scuffs and wear on face, case and band. Due to age, cannot guarantee waterproof. Great for the Engineer or Math student.