A VERY RARE PAIR OF BALTIC SNAP-LOCK BIRDING RIFLES with sighted two-stage brass barrels polygonal over most of their length, rifled with eight grooves, and engraved with foliage at the breech, signed flat brass locks engraved with scrolls and foliage and with engraved brass cover to the steel-springs, and swing-out safety-steels, full stocks, the butts inlaid with brass wire (some missing) and nails and with patch-box beneath, pierced brass side-plates, brass trigger-guards and butt-plates, set triggers, and original horn-tipped ramrods, signed Georgi Gratin, late 17th Century