Hi Dean, I just noticed on the right side of the folding hammer of my above mentioned Merwin Hulbert .38 DA, the very small data stamped on it. There is written "JAN. 27.85". So I suppose that it should be the very production date of the revolver and You estimated it quite precisely. I am really happy now that I know it, it proofs to be an antique firearm according the Czech laws as well, because here for antique guns are taken those made before Dec. 31.1890. Yours truly Jan.

P.S. Today I mentioned the same date (JAN.27.85.) stamped on others Merwin Hulbert Pockets, which seems to be a Patent date for the folding hammer, So Your above mentioned estimated date of the very production would be the correct one. Best regards Jan.