Actually, you are seeing it -- the railway is kept operational and running as part of the regional museum. They have engaged enthusiasts to maintain the locos and rolling stock, and they take great pride in running the train in the summer season, plus at christmas.
A glimpse into the maintenance shed during a overhaul of one of the other locomotives. (also IR, now with Z5/20mm f/3.5 Nikkor UD). These vintages machines are kept in immaculate order and chrome and brass parts are shining. Any spare parts not available are made by the staff.