Two shot percussion parts pistol.  This English percussion pistol circa 1840 is a good parts gun or an item that could be rebuilt.  This would need 2 main springs and hammers.  This piece shows an

This pistol was built by William Egan, one of the British provincial  makers of Bradford Yorks, 1829-1857.  This example shows an 8 1/4" barrel and an overall length of 14", a smooth bore of 52 cal