Type the numbers into google - there is apost on GTROC which is a UK forum.
It appears to be a stock 93 ECU for R32 GTR's. Doesn't mean your GTR isn't a 94 Model.
Just means the ECU was made between Feb 93 and Dec 94 (I think anyways, but read the thread )
EDIT: MT is Manual Transmission. 05U62 appears to be R32 GTR specific and 23710 is likely specific to ECU and date made somehow
Someone else may know as I am just ASSuming