Great watch, great size; on a strap, on a NATO or on the bracelet.
Probably Omega's best example of "go anywhere, do anything". Classic and understated, you can wear it with a suit and look completely appropriate, but with 150m of water resistance and a screw down crown, you can also wear it everywhere else short of full on scuba diving.
This is my second Aqua Terra, I had the 38.5 mm model, but it was not quite right. This full size is perfect.