Originally Posted by Drew Hause
Thanks and interesting.

Here is another 1930 demi-bloc FN
https://www.gunsinternational.com/g...lbs--4-oz---tough-g.cfm?gun_id=101114544

Chantry's gun does have 2 3/4" chambers
'i' is the 1930 lettre annale
The barrels at the time of proof weighed 1.371 Kg = 3.02 #. If > 3% less now (from honing) the barrels are considered out of proof

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After looking at the FN 1930 catalog again as well your link to the 1930 demi-bloc FN above, my gun has more in common with your link then the guns in the catalog. The guns in the catalog all side clips and the Greener cross bolt. Mine does not have side clips or the Greener cross bolt, but a hidden third bite. Not sure why I didn't notice before aside from the fact I can be remarkably dense at times.

I have become addicted to English hammered shotguns to the detriment of my wallet.