Hi Smallbore, that ties in with my experience, I bought an 1840ish Harkom, cased, 2 years ago.Has a bit of provenance (grouse gun of Mr Grant of whisky fame with letter confirming) It needed two new nipples and the case needed work, I paid £1700 plus £300 repairs etc. I will try and post pics when I get to London end of March, best, Mike