According to the S&W company historian, the only dates that are available are the ship dates. I have a post war 38/44 that sat in the vault for 3-5 years before being shipped. The ship date is the only date that is used by the ATF to determine if a gun is eligible for C&R status (over 50 years). You must obtain the ship date to be sure if a gun is eligible. Production dates, if ever available, and I seriously doubt that they are, are not recognized! If you call S&W and give them a serial number, they will give you the ship date!
The other numbers in the yoke are assembly numbers and have no meaning, as was previously posted. I AM A COLLECTOR!
medxam