Found at auction.fr
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A fine flintlock Jager rifle by Caspar Zellner
dating: second quarter of the 18th Century
provenance: Austria
Heavy, octagonal, rifled, 15 mm cal. barrel, signed and decorated with CASPAR ZELNER in silver, adjustable rear-sight and brass foresight; beautiful, flintlock pistol, completely engraved with hunting scenes and floral motifs on dark ground; wooden full stock with engraved and partially pierced, brass mounts, the stock is partially made of horn, the patchbox cover featuring bone, horn and brass decorations. Stecher. Horn-tipped, wooden ramrod with iron cartridge-extractor. With reference to Caspar Zellner see Der Neue Stöckel, Vol. II, page 1431.
dimensions: length 109.5 cm.
https://www.auction.fr/_en/lot/a-fine-flintlock-jager-rifle-by-caspar-zellner-dating-second-quarter-of-the-18th-10973499
