Good observation on the hammer. After reading the comments by Longknife and smart dog, I looked closer at the hammer and I have to agree, it is a replacement and not a very good one at that. I haven't put a flint in the jaws, but from looking at it, a flint would be hard pressed to strike the frizzen face properly. Also, I can see a slight imprint in the wood from what would have been the original hammer when pulled into the full cock position. The engraving on the screw that holds the hammer to the tumbler matches the engraving on the other screws on the blunderbuss, so I think that it is correct. But I agree, that hammer is a replacement. The hunt is on for a correct hammer for this piece. The gentleman that I bought this from told me that his Father bought it in the 1950's while in Europe and nothing had been done to it since his Father bought it. So I have no idea how long ago the hammer was changed, but the aging matches the rest of the lock very well. Thanks again for the comments and the observations. As always, the information and education I get from this site is priceless. Thanks.