So ive pulled this ecu out of a series 2 rb25det s13
this is whats on the sticker on the ecu
CC
23710 21U62
MEC-R622 A1 6X16

Also there is a genuine Nissan remanufacture sticker that says:
2371M 21U62
MEC-R622R 6X17
I've checked several other forums only to come up with nothing
any help would be awesome because i want to know if this is a modified ecu or what it even belongs in
Ron