Cabelas did stock these but no more. Old Cabelas # JD-01-3188. They were also offered here on Walleye Central, but no more. Records depth & temp at 5 foot intervals to 100 feet. I let mine go below 100 feet and the pressure was just too much. If anybody knows where one of these could be purchased I would really appreciate it.

Here is a site in France that shows what it looks like.
http://www.alfos-peche.com/sanger-thermometre-gtm40t+-3-500-000-m1973.html

Thanks to all
Winchester