No indication of choke. No requirement for it to be marked on French guns. I'd be very surprised if both barrels are cylinder. Something like that--or even one barrel rifled (not for slugs, but for greater shot dispersion)--is typical of guns made specifically for woodcock hunting. But those guns also usually have very short barrels. 24" or so. But a lot of French guns with longer barrels come with quite a bit of choke--maybe even more than you want.

Shooting RST shells, your fingers should survive. You might even want to try some of their lighter loads if you find the recoil uncomfortable.