Somehow, over the last year, I've been increasingly drawn to non-round watch cases (except my latest IWC acquisition).
Your collection is gorgeous. I especially like your Harbring2, the Echo/Neutra Rivanera, the GP Vintage 1945 and of course your OF.
Here are my square watches:
1. The Reverso Tribute Chronograph:

2. The Cartier Santos-Dumont Jade:
3. The Hautlence Linear 2:
Happy Easter, Gerard!
Thomas