Quoted from Mopar:
Yes, briefly, but hadn't noticed any in usual places. Nothing under the upper apron either..
Tomorrow I'll check in other places on the cab..
Found this on the serial number site.
"All CDI-Machines, at least from 1966 and upwards, have their number stamped in wood on the front,at the left side beneath the coin-door, and also on the left side of the head. (4 numbers)"