Just perusing "flightmaster only" book, a great resource, and was looking at the author's production figure estimates. of the total 35,000 watches they estimate 14k for .013, 10k+ for .026, and 10k+ for .036. As an admittedly non precise exercise I checked sales on Ebay of flightmasters. There are 40 currently posted of which only 7 are .013, 13 are .026 and the rest .036. Roughly the same breakdown can be found in completed listings. It just seemed curious to me that with the book's assumption that more .013 references were made than the others you'd certainly think they would be more common on the sales sites. Chrono24 shows roughly the same ratios. Thoughts, rants, (no expletives please) welcome.