Here is the description sent to me for the above. Rick.:
The stock of limewood, partly carved with triangular ornament; behind the barrel tang the Nuremberg city mark N. The barrel and lock of wrought iron, the first deeply struck twice with a Nuremberg maker's mark, two crossed crossbow bolts (also known from cranequins of the 1530's-40's), and the dated 1539. Although the upper end of the buttstock shows some damage the whole is preserved in unusually good condition regarding its great age; even the ramrod is the original, retaining its long iron finial threaded for cleaning tools. Overall length 112 cm, cal. 16 mm.
Only one other similar piece is known, the barrel bearing the same marks and date: it is on display in the Germanisches Nationalmuseum Nuremberg