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This is the only reference ican find...

Blackforest Clock Company and Forestville Clock Company
The Blackforest Clock Company of Toronto, Ontario was founded by Leopold and Sara Stossel in 1928. Both clock movements and complete clocks were imported from Germany and sold through department and jewelry stores across Canada. Their son Ed Stossel started working part time with his parents' company in the 1930s, and later became a full-time employee in the late 1940s.

http://www.gleuenberger.com/clocks/MautheClocks.htm