Saint-Gervais–Vallorcine Railway (Mont Blanc Express) SNCF Class Z850 Trainset 52 at Chamonix-Mont Blanc, March 15, 2008 SNCF Class Z850 Trainset 52 at Chamonix-Mont Blanc, March 15, 2008 SNCF Class Z850 Trainset 52 at Chamonix-Mont Blanc, March 15, 2008 SNCF Class Z850 Trainset 54 at Chamonix-Mont Blanc, March 15, 2008 SNCF Class Z850 Trainset 55 at Chamonix-Mont Blanc, March 15, 2008