Help identifying markings stamped on engine

I have a 1990 built Intermeccanica 356 Roadster with a 1700cc '72 to '74 VW bus engine.  After wiping off the area where the VW engine number is stamped, I noticed another series of numbers stamped with ink (paint) above it.  Best I can see is that it says something like "2,010 B" (see photo).  I know nothing about the history of this car or drivetrain.  Any help identifying these numbers is appreciated.