I'm trying to help a friend establish a value on a 1849 Pocket Model. I'm assuming that it is rather rare, in that it is .36 caliber, rather than .31. One source has referred to it as a 1865 Pocket Model. The barrel is 4 1/2", Serial No. is 103xx, all numbers match, and it is in very good mechanical condition - cylinder index timing is excellent. There are faint traces of original bluing. Can send pics. on request. Any help would be appreciated.