The mark on the fw of my 280 was so nearly invisible that my favorite machinist couldn't see it at all, but his sharp eyed young son did, finally. It looked like a halogram of an omega, kindof.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.