1, Limited quantity
2, 200 meters water resistant for diving
3, Back cover serial number entered
4, Reverse rotation prevention bezel
5, Screw lock type crown
6, Screw back
7, Overcharge prevention function
8, Immediate start function
9, Calendar (date) function
10, Born in 1975, from the high reliability and unique looks, LOWERCASE Creative Director Yu Kajiwara who is a professional series originating from a model with an outer body protector that became synonymous with Seiko Divers, LOWERCASE, a consultant on a number of prominent brands a new collection arranged compactly for town use by supervision of Mr. Kajikawa is "Prospex Diver Scuba Limited Edition Produced by LOWERCASE".