(hint - copy the IMG code if you wish to post the image)

That's the best YJ, or whatever it is, forge stamp I've seen. No, you would not find these task marks in any proofmark reference that I am aware of. It notes 2 tasks or 2 efforts on the tube. Gebrüder Heym either sourced the longarm from Fredrich Wilhelm Heym or sourced the same contractor. The scrip "L" has been a hot topic as of late.


Hermann Weihrauch Zella-Mehlis O/U late 1940s



http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=231195#Post231195
This may be the same forge mark, slightly worn, but a single stamp noting a single task.


Greifeldt in 5.6X52R

A very similar script "L" on dougk's Funk: http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=227855#Post227855


It may be that the tube maker's marks after the steel type/bullet are similar.



Axel's Lovely Lovena - http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=227856#Post227856

Kind Regards,

Raimey
rse