Best advice is to decode your vin using that post above.

My GSR is from Japan, are all GSRs from Japan?

I have the 38th 3rd gen GSR. Thats right. #0038, I have it, you want it? Show me money.
Ha Ha.
I doubt that the early production status of my car does anything for me but make me feel special, and the OBD I is a nice benefit for later tuning too...

I am still trying to find out if my 94 GSR, and my Dads 94 NSX immigrated to the U.S. together on the same boat...

Phil