Just picked this up. 20 gauge, unfired, grease dried up and stuck, 2 3/4" chambers, R10. No box or papers, no cast, nice wood and dimensions. 70mm chambers, scary French tripple proof. Appears IC and IM, I don't have tools for a 20 or a 28. No importer stamp, but, "Made in France" in English, on the rib is usually an export gun.
I'd forgotten how nice a Darne 20 handles. Like a 16 on a diet.
I have to strip and clean it. Pics.







Better than typical wood for an R10. 25 1/2" tubes, screams "Grouse!"