See bottom of:
[https://web.archive.org/web/20071010094532/http://www.pacifict.com/Secre...][1]

This is the original version of the Graphic Calculator application
which runs on 68K macs. Tested on a PowerBook 170 under System 7.5.5.

Compatibility
Architecture: 68k

  [1]: https://web.archive.org/web/20071010094532/http://www.pacifict.com/Secrets.html#68k (https://web.archive.org/web/20071010094532/http://www.pacifict.com/Secrets.html#68k)