Two things,
1) here's an enameled piece with RZM mark but no M1/ marking, only the mark 75
2) on Calvin's example shown on pg1, I don't see a hyphen between the "L" & the "S"
1) here's an enameled piece with RZM mark but no M1/ marking, only the mark 75
2) on Calvin's example shown on pg1, I don't see a hyphen between the "L" & the "S"
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