Seiko M354 Memory-Bank Calendar
The Seiko M354 Memory-Bank Calendar was used by Bond in the 1979 movie Moonraker. The watch is equipped with explosives and a remote detonator, which Bond uses to escape from the Moonraker launch platform.
This watch is, like all the Seiko's used in Bond movies, quite rare. Beware of sellers on eBay offering similar Seiko models, claiming it to be the Bond watch, and make sure to get the silver colored version and not the gold colored version, which is also available.