RhB ABe4/4 electric railcar of series 501-504 leaving St. Moritz station 
on 21.08.1992, and will disappear few seconds later in the tunnel at right. 
This one is surely not the nr. 503, because this was seen 3 days before at 
Landquart shops under overhaul.

Photo and scan by Czéh György (czeh@freemail.hu)