This is a glossy colour postcard (size approx 6" x 4") published by the Musée Privée de Documentation Ferroviaire (Mupdofer) of Belgium circa 1990s. Numbered CP16 in their series, it features a view of prototype Van Hool-ACEC trolleybus undergoing tests in Solingen where it was numbered 83 (SG-2109) in the local fleet; it's seen here at Limminghofen working service 681 to Ohligs in 1985. 

• The card is in very good condition with minimal signs of handling; it's unmarked and postally unused and will be sent in a card-backed envelope for added protection.