.This specific Prospex Divers model is affectionately nicknamed the ‘Monster’ by Seiko fans - the bezel is said to resemble an open monster’s mouth baring its teeth. This Seiko watch measures at 42.4mm in robust stainless steel with a rotating bezel, day & date windows and automatic calibre 4R36 movement. Seiko Prospex watches are designed for sports lovers and adventure seekers whether in the water, in the sky or on land. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative technology has changed global dive watch standards.