Lyman numbers and letters on the block halves

[Elric]

numbers and letters on the block halves via Internet archive

Q: What do the numbers and letters on the block halves stand for?

A: Each mould block is stamped of course with the bullet number it will cast. The letters following this number are our reference which tells us exactly which cherry was used. This also tells us its vintage. There are block numbers, each mould will have the same numbers stamped on both halves. This matches up the mould halves in case they are separated.

 

[beagle]

And then, there are occasionally numbers and letters on there that nobody knows what they stand for except for the guy that stamped them but Eric covered what you really need to know in his post. A U after the mould number means it was made as an undersize mould on purpose. Suppose the Os for oversize but I'be never seen one./beagle

 

[quicksylver]

Lyman/ Ideal also stamped mold to differiniate different size /same style IE 358432 comes in two weights one 163 the other 148 , the 148 Ideal is marked 432 S , I assume for short

 

[RicinYakima]

“S” stands for “size”. Made with new full size cherry so run large.