It’s actually not a big job to change the embossing on those molds. The pattern shop probably had updated versions along with older versions on the shelf. It always amazes me that people think that there are hard cut off dates for cosmetic changes. The updated mold could be damaged in production - supervisor calls the pattern shop for a mold replacement - and the old mold replaces the damaged mold. Iron patterns were the same way. Cosmetic changes could be run interchangeably. Engineering changes were more disciplined.
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