Ten years ago, Jacek Kozubek and Scott Kaplan were busy traveling the world looking for vintage Rolex sport watches to buy and sell. Nowadays, boxes and boxes of one-of-a-kind Rolex watches are sent to them and pile up in the corners of their San Francisco shop, HQ Milton. In the past decade, they’ve built a reputation as one of the world’s best sources for the iconic models they sell online and through their appointment only shop.