https://www.watchuseek.com/threads/a-fairly-comprehensive-review-of-the-omega-seamaster-200-pre-bond-series.316149/

The Seamaster 200 was introduced in 1988. Like many other Omega lines, the Seamaster 200 was tied to an event that touted its deep-sea qualities. According to the official Omega website "On July 25 1988, the Seamaster Professional 200 meters calibre 1111 took part in the IFREMER Faré mission, during which the French scientific submarine Nautile dived 4,400 meters (a new record) below sea level in the mid-Atlantic to install the first link of a channel to monitor seismic shift."

The Seamaster 200 was never really appreciated in its time and in fact received its nickname "Pre Bond" as a result of the model that followed it. Omega even lists the line in the vintage database as Pre Bond. From the Omega vintage database it seems that it was introduced in 1987/88 and ran through 1995, however it was effectively replaced in 1993 by the "Bond" Seamaster 300.