Shotgun ident. and any helpful info

Needed - any info printed or otherwise on a sxs 16 ga. French made shotgun I have bought.This gun is marked "Grippe Helico" on the top lever and bears name "A. Maisonial" under guard tang. Has light English scroll engraving, proofed Ste. Etienne. What is history of maker or guild, comments on quality appreciated. Worth? Thanks. R. Carly