If you call Customer Service, they'll be able to give you the date of manufacture. They probably won't have more information than that.
The 457D is one of the "mystery guns" among the 3rd Gen guns. There is nothing in the SCSW about them at all. The only pictures I've ever seen were posted in the For Sale Forum here a few months ago.
The serial number on that gun was VJBxxxx. The SCSW shows VJA prefixes as being made in 1997.
Do you by any chance have the box?
I'll mention in passing that we always like pictures of rare variations here in the forum.
