Help with dampener ID

to me it looks like a damper for a cast crank 340, the 360 dampers i saw are different.

Normally the cast crank 340 dampers are cast with some text "for 340 cast crank only", sth. like this. This one has no text, is there a number somewhere?

Could be that somebody used this damper and rebalanced the assembly....nobody knows.

Michael