Tank Must de Cartier watch Something Blue Case back engraved with the

Case back engraved with the handwritten signature of Alberto Santos-Dumont

the refined finishing of the movement is visible

while the see-through screw case back reveals the finely finished movement

which can be swapped out easily

Tank Must de Cartier watch Something Blue Case back engraved with theTank Must watch, large model, High Autonomy quartz movement. Steel case, beaded crown set with a synthetic cabochon shaped spinel, silvered dial, blued steel sword shaped hands, black grained calfskin strap, steel ardillon buckle. Case dimensions: 33. 7 x 25. 5 mm, thickness: 6. 6 mm. Water resistant up to 3 bar (approx. 30 meters 100 feet).