Wayne sent some pictures:







Proof date 1930
Weight of barrels at time of proof 1.224 kg, 2.69 lbs
chambered for 12ga 2 3/4", 70mm barrels are choked
nitro proofed
Makers marks on the barrels:
LR L Rotsaert 1920-1952
JT Jean Thonnard armuier (dealer) 1889

Pete