Alex:

I have found this mark, or a variation of this mark, on a Luft2, which puts its use up to the 1936 period.

I have also seen this mark on TR era bayonets.

John

TM - No Oval.JPG (38.99 KB, 77 downloads)
Fahnen - Reuter Munster Distributor.JPG (39.73 KB, 77 downloads)
Obverse Grip.JPG (39.84 KB, 77 downloads)

Always looking for Eickhorns and etched bayonets.