Many thanks to you all for the advice and time taken in my potential purchase of a Panerai.
Well. potential no more. I am the very proud owner of a 183 G series. In negotiations with the dealer and a further more informed look (thank you) at the watch and accompanying papers I took the plunge (UK£3k) and have had a full day looking at it when I should be concentrating on other matters.
Stitchy, the strap is an OEM Assolutamente and is very impressive in the flesh. Pics below have suggested to me that I should clean the strap but I'm now reluctant to do so on advice from the Panny website. Comments are that each one ages in a unique fashion (!) no less.
I do wish to buy an OEM Crog Antique Gold I think. Any other suggestions?
I am delighted with it so thanks to you all once again.