Some Feedback on these items:

MINT / Near Mint Condition!
Vintage Sierra Art Deco
Ribbed Toggle Switched Duplex Outlet Wall Cover Plate
WITH NEW SCREWS!!!
Circa 1942-1950s
  • All Plates are hand washed and free of paint.
  • Plates are free of any chips or fleabites
  • Plates are lightly hand polished to insure quality NEW-LIKE matching finish.
  • Comes with NEW matching Ivory Finish Installation Screws!
  • ALL plates are inspected multiple times to be as close to New Condition as you will find ANYWHERE!
  • Some NOS (New Old Stock) plates are occasionally in this lot since these are of equal quality!
  • As per 1942 design patent 151,907 applied for in 1946 and granted in 1948, these are original D-18 Art Deco Ivory Bakelite wall plates by Sierra / McDonald Mfg.

Dating Your Sierra D-8 Ribbed Wall Plates:

1. Plates marked "McDonald MFG CO" with NO patent reference are early 1940s -1945
2. Plates marked "McDonald MFG CO" with "Patent Pend" or "Patent Applied for" are about mid-1946
3. Plates marked  "Patent Applied For" but WITHOUT CSA mark are from ca. Late 1946
4. Plates marked  "Patent Applied For" AND WITH "CSA" mark are from Late 1946 -1948
                             NOTE: CSA marking ("SA" inside a "C") was inspection mark introduced in 1946
5. Plates marked "Patent Applied For" AND WITH  "Pat 151,907" (often in circle) are ca. 1948 approximate
6. Plates marked "Pat 151,907" (No patent pend or pat applied for) are After 1948