As I have stated many times on this forum before about S&W's, "sometimes we just don't know what we don't know".
S&W was a company in the gun business wishing to sell guns. They would do just about anything that was possible for a customer/sale as long as the customer was willing to pay any additional fees required.
You can have 50 guns in serial number order all in the same configuration except one that had some special treatment applied. Unfortunately the hand written records (that are now 150 years old) don't always give the whole story or are impossible to read.
There are some S&W mysteries that will never be solved.
