Kindly tell me the manufacture and approx. value.

national collector's mint giant silver 50 states commemorative proof

Fireplace cover(surround) Victorian?

1987 Plate Number 17510C

of the only limited edition of "The Shadow Artist" by Norman Roackwell.  Eleventh in the Rockwell Heritage Collection, and bears the seal of the Norman Rockwell family trust.  Made in a llimited edition Permanently cloed in 1987 by knowles and cetified as a true "Rockwell Classic" by the Rockwell Society fo America.

Bradex Number: 84-R70-3:11

All 50 states, uncirculated state coins;