Are you interested in the original Goulcher locks, or the R.E. Davis reproductions?
I have one of the Davis locks on a pistol. It does what it’s supposed to do. I have no complaints.
I will say that a lot of old, original locks were marked with the maker’s name and frequently some artwork… hounds, pheasants, and so forth. Very few modern-made locks have anything at all on the plate. Davis made an effort to replicate that old-time style with the Goulcher lock. I like it.
The original Goulcher locks were used on thousands of guns. My dad had two antique Goulcher locks in his collection. I recall they were nearly identical, except one had been used, and the other had not. It hadn’t even been drilled for a lock bolt. Both were very nicely made. I don’t remember if either had a fly in the tumbler or not, but I do remember very good finish work, strong springs, and positive “clicks.” Even at 150+ years of age, most of the antique locks I’ve handled have shown smoother function and more positive engagement than typical modern made locks.
Anyway, Goulcher locks may not have had the jewel-like finish and precision of locks by Manton or Purdey, but they were good locks. The Davis reproduction is also a very nice lock. I certainly have no complaints with mine.
Best regards,
Notchy Bob