I have found 4 Carl Julius Krebs maker marks:

Double Oval Large
Double Oval Small
Single Oval Large
Single Oval Small

I know these are on 2nd Lufts, but I expect these to also have appeared on Heers.

J

TM Dbl Large.JPG (36.99 KB, 412 downloads)
TM Dbl Oval Sm.JPG (36.07 KB, 410 downloads)
TM Sgl Lg.JPG (36.14 KB, 411 downloads)
TM Sm.JPG (36.63 KB, 410 downloads)
The Two TMS Dbl.JPG (41.69 KB, 412 downloads)
TM Sgl Oval Sm and Lg.JPG (40.3 KB, 408 downloads)
The 4 TMs.JPG (38.24 KB, 410 downloads)

Always looking for Eickhorns and etched bayonets.