LEFF Amsterdam Watch Tube D38 LT71021. 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 brass watch case is made of high quality 316L stainless steel, contains an analogue movement and has a diameter of 38mm. The black leather strap has a length of 20 cm and is also available in brown. The watch contains a Japanese Miyota timepiece and a glass plate made of Mineral glass. The details in the crown are cut with a diamond. This Tube Watch has a water resistance of 5ATM.