Mike
Looking at Sheldon's reference sheets the first white faced were used 1972-75.
BLACK Marbles approx. 1975-83
Second white faced, that were similar to Marbles, but white faced, 1983-97.
Black luminescent has been used since 1996.
I do not know if the white faced were made by Marbles.


Edited by rodbrown (08/11/25 09:19 PM)
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Rod Brown
RKS 3846
RKCC CM-123
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