Hello, does anyone have the Standard directory of proof marks? I'm trying to research a Belgian 12ga double that I picked up. I found the WW Greeners gun and it's developement, but it seems a little sketchy on Belgian proof marks.
I'm wondering what pressure my barrels and action were proofed at?
The flats of the barrels show:
scripts EL
a diamond on a stick
1kg 418
u
M with a dot above it
A lion over a line over a P.V
Oval with a crown and inside is E L G *
and a wierd looking Y 11
12-70 inside a sideways horseshoe

On the rib is says
Siemens-martin-steel
AD. Bouquin. Liege

The action has some similar marks and SN 490X

Any idea on pressure tested at
maker
date
??????????????????????
Thanks.
Could it have been nitro proofed at a later date than manufactured.