Just in from Tom Johnson is this, the most common Zeitler maker mark, in my opinion.

I still don't understand how a small, cottage maker like Zeitler would have 4 different TMs.

Here is my third mark, the single line Zeitler to go with my two liner and with the arched version just above.

John

TM.JPG (39.3 KB, 295 downloads)
TM 1.JPG (40.22 KB, 293 downloads)

Always looking for Eickhorns and etched bayonets.