A GERMAN 16-BORE D.B. PERCUSSION SHOTGUN with twist barrels signed in silver on the rib, engraved tang, signed scroll engraved locks each with swivelling safety-stop in front of the hammer, walnut half-stock (fore-end chipped) carved with foliage behind the barrel tang and cheek-piece, chequered grip and fore-end, engraved white-metal mounts, iron sling swivels, and wooden ramrod with worm, by Johann Rein in Marckt-Heidenfeld, mid-19th Century; a German breech-loading air gun with tip-up swamped octagonal barrel signed in silver at the breech and lined with brass, walnut full stock (fore-stock replaced) lightly carved with scrollwork, hollow butt (repaired) with cheek-piece and housing the bellows, and plain brass mounts of shaped outline (trigger-guard, trigger mechanism and ramrod missing), by Johann Döbler, Eichstadt, early 19th Century; and two German percussion guns, each converted from flintlock (all with surface rust), each 18th/19th Century