I recently purchased a used S&W Model 60 in .357 Magnum, j-frame stainless. Does anyone know if this gun was sold new as a Magnaported revolver? Did S&W do any collaboration/partnering projects on revolvers like this? Note the factory box label references “MAGNAPRTD”. I love it regardless, but would love to know if models like this were shipped to retailers already ported (special order?) or if it was done by a previous owner. Also, does anyone know the mfg date based on the serial number? Thanks in advance for your expert insight.