Speedmaster Moonwatch 3570.50

Moonwatch reference introduced with caliberCaliberThe designation of a watch movement, identifying its design or movement family. 1861 in 1997; dial and hands moved from tritiumTritiumA radioactive luminous-paint ingredient used on many vintage watches after radium. On RAF IWC Mark 11 replacement dials, an encircled T identified the tritium specification. to Super-LumiNovaLumiNova and Super-LumiNovaTrade names for luminous coatings that absorb light and release it in darkness. These non-radioactive materials differ from radium- and tritium-based lume. during 1997, the first pieces still tritiumA radioactive luminous-paint ingredient used on many vintage watches after radium. On RAF IWC Mark 11 replacement dials, an encircled T identified the tritium specification.. Superseded in 2014 by ref. 311.30.42.30.01.005.