現在展示： 美國 - （通用）郵票 (1930 - 1939) - 4 郵票.
26. April 窗口管理器: 空缺 篩孔: 11 x 10½
![[The 300th Anniversary of the Settlement of Connecticut, 類型 JJ]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/JJ-s.jpg)
29. May 窗口管理器: 空缺 篩孔: 11 x 10½
![[California-Pacific Exposition - San Diego, 類型 JK]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/JK-s.jpg)
30. September 窗口管理器: 空缺 篩孔: 11
![[Boulder Dam, 類型 JL]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/JL-s.jpg)
1. November 窗口管理器: 空缺 篩孔: 11 x 10½
![[Michigan State Seal, 類型 JM]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/JM-s.jpg)
