the "silver ore" is very light weight...or is it my imagination?? Ours is postmarked...looks like 1951, but the "1" is right where the perforation from 2 (unattached) stamps meet, so it could be some other number.
The bag on the Las Vegas card says "SILVER ORE from Silver State Nevada" on the other side.
BTW, Doug, I love the Pagoda matchbook! Geez, I wish we lived on that side of the country...would be so much easier to find Nevada stuff!!