Antique Real Photo Postcard. Published by Engadin Press Co. Card No. 938. Divided back, unused. Pontresina is a municipality in the district of Maloja in the canton of Graubünden in Switzerland. This alpine village located high in the in the Engadin region of Switzerland. It sits in Val Bernina, which is the highest altitude valley that branches off the Upper Engadin Valley. Condition: Excellent.