Not to be mistaken for the later 6R15 model. This extremely rare model from the 1990's has the desirable high beat 28,800 bph caliber movemenet. It also the model with the most sought after "Alpinist" name on the dial. The watch runs great and is in very good condition.
Here is a great article on the history of the Alpinist:
http://www.gmtplusnine.com/2009/02/14/the-alpinist-%E2%80%93-the-summit-of-seiko-branding/