Some added notes on Dohrmann--In 1907, they bought out the stock of Albert Pick in San Francisco (appears to be the priod when Pick retrenches to the east and drops San Francisco from their china marks). Previous records on the closing of the Anglo-American Crockery Co. (S.F.) in 1910 indicate Dohrmann bought their stock out. A new record found indicates they also assumed all of the accounts of the company. In 1911, the stock was sold off at the Emporium Store, so all of the assumed accounts would have to carry Dohrmann marked items after this.
Dohrmann flatware (mainly forks and spoons) surfaces regularly but never in groups. Along with their marks, some pieces carry line or pattern names. Quality varies. Some knives carry old style blades, so perhaps related to an early production era. I personally have not encountered any topmarked pieces for users that I can recall. (This could help in dating.)
Dohrmann operated at least Seattle to San Diego, and Hawaii to Montana. Their full operating territory is not yet clear. They have also been listed among naval supply bidders, and did work for the US Maritime Commission related to Victory Ships.