No visible marker markings and has a rotating faucet breech that loads from the top when in full cock. When the trigger is pulled, the faucet breech rotates and lines up with the bore, while simultaneously allowing air to pass through in order to propel the ball. Chambered in approximately .42 caliber/10.5 mm and features a part octagon barrel, and a shagreen (shark or stingray skin) wrapped iron stock air reservoir. Provenance: The Dr. Robert D. Beeman Collection