The Sinn U1, made in tagimented submarine steel has gained some interest amongst the collecting cogniscenti in recent years. The small German manufacture, from the Frankfurt area, now owns and manufactures its own cases in their SUG factory in Glashutte. And made of super harderned tagimented steel, makes a very nice, rugged watch for sporty intents.
I do wear my U1, The Hour Glass Tempus Edition for my cycling. And recently, met up with a friend, mid-ride for a beer. And he wore his Sinn U1 The Hour Glass All Black edition. Shown below, both watches.