Wickham Conversion

[RSMorris]

Would anyone know who did the conversion on this Wickham lock? Please no guesses, I can do that.. I believe it is a drum in barrel
conversion. Have looked at a lot on the net, some are close, but no cigar. I have three of the locks and have identified who did the conversions
on those. One was a Leman and the other Hewes & Phillips.

 

[MarkTK36thIL]

I've had a drum bolster conversion from Wickham in this manner. Moller's Vol 3 has an identical example in this manner as well. I couldn't say who, did it offhand, but was certainly an easy way to convert to percussion rather than doing brazed bolsters or Ames patent breeches.