I bought some parts for my 911 project and the seller "threw in" another Porsche crankshaft from a 356. I'm having trouble identifying what model it is for though. It's hard to read, but I believe I can make out the number 505.02.111 on the crank (the first three digits aren't very clear). However, all the 356 crank numbers seem to begin with 502 or 616. Any ideas what I've got? Is there another way to idenfity the crank?

I'm not sure if it will even clean up and be worth anything, so I thought I'd try to identify it first. Thanks.