I posted about this earlier. For the first three seasons of Magnum PI he wore an Chronosport Sea Quartz before switching over to a Pepsi Rolex.
The original owners have created a new brand called Momentum that has a watch called the Sea Quartz. So being a fan of the show I ordered one since the specs are good sapphire crystal, 300 m Water resistance, etc.
Never ordered a micro brand watch or a watch with a tropic strap but got this in today (with a free Hawaiian Shirt as well lol)
Here’s presumably a Magnum PI picture of the OG watch
42 mm but wears smaller on my wrist than my other dive watches (plastic still on)