Agreed the model 10 clasp is amazing. I haven't had any of the previous versions so I can't say as to how much better version 4 is but I love mine. I couldn't decide between the A and AA as to me the AA is a more everyday piece not too small and not too big. The A def has some heft to it. I decided to get both for the days when I want to go big

Thanks guys!!

Agreed the model 10 clasp is amazing. I haven't had any of the previous versions so I can't say as to how much better version 4 is but I love mine. I couldn't decide between the A and AA as to me the AA is a more everyday piece not too small and not too big. The A def has some heft to it. I decided to get both for the days when I want to go big

Thanks guys!!