From what I can ascertain, Gerb. Bohler & Co. was originally located in Kapfenberg, Austria and later had facilities in Germany. The company was primarily a steel manufacturer to be used for tools and guns. There have been others who have posted razors from the Bohler Co. Here are two links you may be interested in:
AUSTRIA DAMPFHAMMERHÜTTE DER BÖHLER-STAHL-WERKE IN KAPFENBERG, STEIERMARK | eBay
http://straightrazorpalace.com/razor...r-set-7-a.html
Question: Could the "Ta" you said was in the tang be "Ia"?
Randy