Bidspirit auction | North Korea

North Korea - 1988, Winners of Calgary Winter Olympic Games, Ski Race, error denomination of 10ch and top inscription ''Pirmin Zurbriggen'' instead of denomination of 30ch and top inscription ''Mario Matikainen'', bottom left corner sheet margin single, full OG, NH, VF, a correct stamp of 30ch is included, Est. $200-$250, Sc. #2793 var