Seamaster Pre-Bond Professional 200 m (Pre-Bond)

Collector name for the 200 m Seamaster Professional divers that preceded the 1993 Seamaster 300M: integrated bracelet with wetsuit extension and safety lock, 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. dials, quartz or chronometerChronometerA watch or movement certified for timekeeping precision under a defined testing standard. The applicable certification depends on its maker and period; it is not the same as a chronograph.-certified ETA 2892 automaticAutomaticA mechanical movement wound by a rotor as the watch moves on the wrist.. Reference numbers are not given by the cited source.