1978 T19 Developing Oil Industry 6-stamp set Unused This is from a personal collection. Please note that this item has been stored and inspected by an amateur. There is glue on the back. Please be sure to check the details before purchasing. My great-grandfather is decluttering and selling these items. I have the items on hand, so I can answer questions and add photos regarding the condition of the items. *Please be sure to confirm before purchasing. Significant price reductions are not possible. Chinese Stamps T19 Removing Mining Machinery Female Workers Extracting Oil Construction of Daqing Oil Field Dongfanghong Refinery Underground Oil Pipeline Exploration No. 1 and Bohai No. 1