The watches are previewed online here, and can be seen in person at Sotheby's in New York City. The live auction takes place at 2 PM on Friday July 19th. The lot runs the gamut, with a strong showing of the earlier Speedmaster, like Lot 10, and reference 2915-1; the very first Speedmaster. Released in 1957, this reference, with a base of 1000 bezel in steel, is the archetypal sports watch in many ways. It was developed for timing car racing, featured a radium-lumed dial, and highly legible Broad Arrow hands, and was powered by legendary caliber 321. The watch introduced the design element of a fixed bezel mounted on the outside of the watch for best usability.