Seiko Alpinist SARB017 Automatic.
I believe they have discontinued this model and superseded it with the Alpinist Prospex model SPB121J.
Gorgeous watch to have on a Steel and Gold jubilee bracelet.
Automatic Movement with 50-hour power reserve
Sapphire Crystal and Inner Rotating Compass Ring
Case Diameter: 39.5mm
Water resistant 200m (660ft): in general, suitable for professional marine activity and serious surface water sports, but not diving
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Chrono24 have the cheapest BNIB at $799 from a Japanese AD, but this price excludes VATs etc.