T, Here are some options for Wa state.
Old License Farm
Medical Lake, Wa
509-244-3149
or
Jim's (NOT ME) Vintage Parts
Gresham, Or
503-669-0943
Both specialize in Old License plates and tags and both have lots of info. Wow
one is in your neck of the woods.
Also check out;
www.leg.wa.gov/wac/index
Look for WAC 308-96A-074 Antique vehicle-- collector vehicle license plates
They have info on both Washington issued collector plates and "restored license plates".
Jim
Wa plate's
169INDY
SSRS396