Thanks StormTrooper4 that is a really really helpful reply.
I had assumed the 196 and 250 were the same but wanted to check that one wasn't made by a different factory. Great price as well so I think it's definitely the 250 for me then!
I see from previous posts that you love our 196 and I am sure you wear it well!
As ever some nice new shoes will be required as the straps are always poor but you're right when you say the saving will pretty much sort that.
I also see they seem to be K serial numbers and I like not having the newest letter model for some reason so all good.
As for the Chrono wobble I've had gens from panerai - non Chrono I must say that don't compare the some of my reps. So all swings and roundabouts.
Hanks again.