Raimey,
As requested, my CD hammer shotguns:

My 10g in the photo:
# 920. / NO barrel stamps ( Lindner pistols)
Just small letters A.S.

30% scroll engraved 12 ga
# 2560 / crown over crossed pistols
Small letters K.S.

Diamond grade 10 ga
# 2544 / crown over crossed pistols
Small letters E.E.

Best regards,
JBP