The Nixon Mens 51-30 Chrono Watch, seen here in brown. |The 51-30 Chrono Watch from Nixon is a chunky and rugged design that is packed with high-performing features. - Stainless steel case - Hardened mineral crystal face - Japanese six-quartz movement - Second sub-dial, chronograph and date counter - Unidirectional rotating bezel - Leather strap with pin buckle fastening - Nixon branding - Waterproof to 300m The watch face measures 51mm in diameter.