Damga tarihi : 1975 Hong Kong

Bridge Slide Club antetli posta kartı. Dördüncü uluslararası BSC renkli slide sergisi kartı.

Date of use : 1975 Hong Kong 

Business stationery (postcard).Used by the Bridge Slide Club in Hong Kong.The card served as a notification to participants of the score given by the judges to the color slides submitted for the 4th BSC international salon of color slides 1975.