Your L-mold chip is 100 % certain from the
Ponderosa Club in Santa Rosa . The L-mold chip
was used 1960 to 1966 (approx.) The earlier
mold chip (Square-Square-Diamond) was used from
1954 to 1960 (approx.)
I have the 25 cent SQ-SQ-DIA chip in my
collection . Red with 3 yellow edge inserts .
I will "scan" the chip later and post it on
Greg's BB . JOHN J.