TotW is an increasingly good venue for antiques and reproductions. If you really want to scare yourself try Roosevelt and Drake--they are pushing mint stuff in original maker's case with untouched frizzen, blah blah. And it's not under-priced. Of course the value drops by 60% when you walk out the door, and another 60% if you ever test fire it!
I've never seen a real Mortimer.
There are a lot of detail similarities between that Burrow and my Manton--obviously part of the same London aesthetic (and probably time).
