22RE head / rocker assembly identification?
 

Does anyone know if there are any identifying marks on a 22RE head and rocker assembly that would identify it as factory Toyota not aftermarket? Im rebuilding an engine I bought off Craigslist, had it bored 20 over and the crank turned 10 over, used all OEM pistons and bearings and had the head redone with with an angle valve job, new springs and seals. Im just curious if the head is original or not, the machine shop said it looked like it had been bead blasted once before... OR its a cheap aftermarket part that I just had rebuilt! Pics of it as it is today and how it was the day I picked it up: