I was on the lookout for a mint condition Sea-Dweller 4000. I saw a listing from David and Sons on Chrono24. I inquired about a possible trade for my GMT Master II Rootbeer. Within a couple of hours I got a response from Natan. Natan was very attentive and responsive to all my questions. He was polite and sent multiple pics of the watch at my request. I felt that he was very engaged throughout the entire process. He inspected my watch in trade only a couple of hours after it’s arrival to him. As soon as he did that, he was kind enough to remove the divers extension and give me an additional link for the SD that he was sending my way. No issues at all with my bracelet alteration request. The watch I received came in the exact mint condition as explained. Natan also found the white serial tag that comes with the full set and included that in the box. A+++ from all aspects of this smooth transaction. Natan and his team are true professionals of the watch industry. Thanks again.