Identify this piston

[debby]

Spare piston that came with my 1965 250 Scrambler. The top is stamped "90" and indeed it is .090" oversize. Pretty sure Ducati didn't make oversizes that big. There's also an arrow stamped on top that says "FRONT". I'm guessing it's of American manufacture, maybe Wiseco? Wondering if anyone recognizes it.

[Eldert]

its a American made piston allright . i have one to that still in the original box
it says MC forged pistons . M-C supply co L.A , Calif.

Eldert