I’m afraid I know nothing about Teriam, and Googling the web doesn’t reveal much either.  It houses my old favorite, the Landeron 4750; the movement is marked “Teriam”.

Note: For details on the use of modern batteries in Landeron 4750/4760 based watches, please see the relevant page in the Landeron section of this site.

Teriam (Landeron 4750)