Vestal Transom watch. The Transom Waterproof has a clean, fashionable and ultra-thin design enabling the watch to be worn comfortably under a wetsuit while surfing or under a dress shirt while at work. The Transoms slim design makes it very light weight and at 6.5mm thick it is the thinnest metal case in the Vestal collection. Its case is made of solid marine grade stainless steel coupled with a mineral crystal creating a combination that increases water resistance in and out of the water. The 24mm wide polyurethane custom strap includes our patent pending OKTOLOK technology securing the strap to your wrist. Imported.