my dad owns  the first ever ping slazenger putter and it is engraved by Jack Nicholas is it worth anything

Yes

Depends on condition,with the shaft band on, original grip and head mint it could be worth a grand, but they usually go for a lot less battered up, I've seen them go for as little as 200 quid. The Gary Player is worth a lot more

We covered this in another thread, this was my post:

"The authority is www.pongman.com, go here: http://www.pongman.com/index3.htm for yours, and I expect he (Dalton R. Daves) wrote the book someone referred to. You will have to use IE to access his site as it does not work with FF, well mine at least."

You may need to search the site for your particular model. Good luck.