Antique Georgian oil painting on glass portrait of Christ's Crucifixion

Antique Georgian oil painting on glass portrait of Christ's Crucifixion. English School, circa 1800-20. Unsigned, artist unknown. Painted on the reverse side of a panel of glass. Wooden frame. Size of frame: 16.25 x 12 inches; Size of glass: 14.25 x 10.25 inches; Size of front portrait aperture: 13.5 x 9.5 inches. Weight: 950g (allow 4 kg volumetric weight once packed). Condition commensurate with age - various superficial marks & scratches and some knocks to wooden frame but all part of its charm and character. Priced accordingly. Apologies for glass reflection in photos.