Abu Alex
1557
Personally, I always found the 5396 slightly clumsy looking due to the shortness and thickness of the lugs and the thickness of the bezel compared to the size of mid-case.
My favourite classic ref. 96 type cases are the ones of the 5170, the 5296 and the 6196. Perhaps, the 6196 is the best Calatrava in all of Patek's history.