This was Omega’s first response to the Speedmaster’s involvement in 1969 Moon landings. There are actually three different versions. These are rare, and now the market has responded and values them higher than a -69. The “Flight Qualified”case back is also replicated in a service case back, easily identified by the longer case back slots. The “Apollo XI”case back is much rarer, and if two collectors see it, they will fight hard for it.
I would expect this reference to carry the DN90 bezel.
31xx xxx – 32xx xxx