LEFF Amsterdam Watch Tube T40 LT75131. For the design of the Tube watch we teamed up with Dutch Designer Piet Hein Eek. Piets unparalleled vision on design and LEFF amsterdams raw, industrial and sophisticated approach, came together in an amazing collection of refined yet tough watches. The design of the Tube watch has an iconic ring that functions as the clocks face. Therefore, you can recognize every LEFF amsterdam watch by this unique characteristic. The steel watch case is made of high quality stainless steel, contains an analogue movement and has a diameter of 40 mm. The green Nato strap has a length of 19 cm and is also available in the combination steel sand. The watch contains a Japanese Quartz movement and a glass plate made of Mineral glass. The details in the crown are cut with a diamond. The straps of your T40 watch come with a quick release system, so you can easily change color bands. This Tube Watch has a water resistance of 3ATM.