This collection, in the Luminox Space Series, features the use of stainless steel with gun metal finish as the watch casing portrays a sleek finish like that of space shuttle craft.
Stainless steel is hard and durable, helping to maintain the integrity of the watch. Many GMT watches feature dual time zones, however the Space series features triple, making them unique and useful to many. The second and third time zones are indicated by the blue or red arrow-hand, as well as the watch bezel. The 5121 BO has for its strap a durable Cordura. The material is washable, helping wearers to keep their watch straps free from sweat and dust.