I’m not a dive watch guy, but I enjoy the Spring Drive tuna. The dial is great and I like the date and power reserve that make it look like an instrument.
The highest quality leather comes from animals raised primarily for their skin. Economically, even if leather is a byproduct, it factors into the industry. Raising an animal and knowing what all of the parts are worth, whether meat, skin, bones, or other tissues is all a part of the market for that