Omega gents de ville hour vision orbis omega co axial master chronometer 41 mm the 41 mm case is made from stainless steel while the parform hands and upper facetted indexes are made with 18ct white gold making it a fine celebration of the critical eye care provided by orbis international and its flying eye hospitalsteel on leather strap movement self winding movement with co axial escapementpower reserve 60 hours case steeldial bluecase diameter 41 mmwater resistance 100 metresc