can anyone identify this part number?
 

It is from one of the cam boxes on a motor I've got lying around for a future project. 9011051110R.

It is a pretty interesting motor. 7R case w/ head dated '71, weber 46's, marelli twin plug dizzy. displacement unknown but it is supposed to be either 2.8 or 2.9. built by callas rennsport 10-15 years ago.

Thanks.