Well this is a first for me. I've never had this model before though I've spied it a time or two.
I believe this to be the 1952 Harrington. He's not often seen, but when he is it's usually described as "Sea Shell Lugs".
The men's bracelet on this watch is a "<JB> Champion" and looks to be the original as per the advertisement showing it from 1951.
Pretty unique and really sharp.