In light of Scott's recent post:
1930 32" 20g Trap grade (restock) courtesy of Chuck Heald
Reinforcing wedge, factory 2 3/4" stamp, and 'Crown over D' mark of Jean-Baptiste Delcour-Dupont/Canons Delcour S.A. of Nessonvaux.
And possibly the
FIRST REGULAR FRAME 20G just found by David Williamson