Johnson 60 hp Prop Question(?)

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I have a 2003 Johnson 60hp 4 stroke with an old aluminum slightly beat up prop on it. I believe this is a 13 spline prop. My question is I have no idea what the pitch is on it (currently) or which pitch would be best for my 97 AQUSPORT STRIPER 165? There are no numbers stamped on it that I could find, probably the original prop I would imagine

Any help would be appreciated.

Many thanks!

Casey