Writing on piston tops

Just looked inside my new to me 38 flathead. Cylindet walls look brand new as do the pistons . My question is what is written on top of all the pistons. There is STD stamped in each one then a number (im assuming std stands for standard and the number is for the cylinder. Then in sharpie the builder wrote STD and OIT...what is OIT?

 

It's yiddish for something... say it when something's not quite clear, or you are taken aback.

 

Like...''oit, i got another STD''

 

lol!!!

 

hahahha yiddish std....ziiiiiiing!

 

01T is actually a Ford code for a light, 1940 (first year produced) "truck" part. So, it could be 1940 pistons, "standard" sized (same as your '38 bore), meant for a light pick-up engine application...ORIGINALLY. DD

 

Perfect! Thanks for the info.