1979 FDC of T41M Study Science from Childhood Souvenir Sheet, used locally in Beijing with dater and commemorative postmark.

• 1979年北京本埠封，贴T41M从小爱科学小型张一枚，销北京首日纪念邮戳和首日日戳，有次日到达戳，极少见，保存完好