"ST923ESCIA"

Took the suspension off this weekend to clean and repaint it. When it goes back on (maybe next weekend) it’ll hopefully be the last time it’s off in my lifetime. Cleaning it this afternoon I noticed something that has eluded be before, a number cast into the front axle -- "ST923ESCIA". I have no idea what it means. I have previously documented the number etched in the top, but this is different. It seems that die were put in situ before the molten metal was poured. You can see in the photo above that they are raised whereas the former are engraved (post casting). I am excited to get this done because then thing can start getting assembled quickly.