The Mk1 Patent Pendings occur within a very narrow serial range...one batch starting 1.7 and another batch starting 2.2. I have owned Mk1s in each of the two batches. I will answer one part of your question and that is that I have had Rolex-to-Diver watches in each of the two batches...so direct prototype for testing watches delivered directly from Rolex to a test diver. I have also known of prototypes/test watches direct to divers from both batches. I dont think it is correct to assume one batch went to divers and another batch for sale at ADs. The sample size for the latter is minuscule.



