Glossery?

OK — I’m admittedly not the brightest lamp in fixture.  I just received another gorgeous mould I can’t wait to cast with.  Here’s my question?  WHAT do the letters in mould description stand for?  I can get the last, “2 Cav PB Brass”  as denoting it to be a 2-cavity plain base brass mould.  But, mould label is SC432-267-RF-Z4 — what does “SC”; “RF” and “Z4” denote? 

Hey, this is rainy day wondering — I know it’s a 2-cav brass .432 mould with a plain base which should drop bullets in the 267 grain range.  I looked for a bit to find a glossary on this site or Google to find the others no avail.  If there is a glossery,  might you direct me?  In any case, again, I’m curious what the code letters stand for.

Thanks.

geo