p.s.
do a search on the Mamiya America forum at www.mamiya.com and you will see that it is not that easy to work out this sort of thing!

By martink on Friday, June 11, 2004 - 10:43 am:

I would check again with your source!
My info does not match yours!

By Anonymous on Thursday, June 10, 2004 - 04:09 pm:

I've been told that the first letter of the serial number is coded for the year the item was made.
For example, I was told A=2001 , B=2002 , C=2003 and that P=2000.

So can someone tell me the rest of the code? Specifically what O Q R S mean.

Thanks.