Technical Weber Flywheel?

Can anyone tell me the application for this Weber Aluminum Flywheel? I don't see any part numbers....the timing marks are on the outer edge of the part...Thanks for any help....

 

measure the diameter of the inner hole, as well as the ring gear.

Chevy 2.5" id, 3.58" bolt circle, 12.75" (153 teeth) or 14" (168 teeth) od

If it's not for a Chevy, then post the dimensions.

 

Would a Chevy have the timing marks on the outer rim?

 

An Italian car?

 

If the flywheel was used in a race car without a damper, perhaps someone added the timing marks?