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Marconi's Spark Coil and Spark Gap
- Scott 编号1500系列Electronics Progress Issue规格40 x 25 mm设计者Walter and Naiad Einsel印刷厂Bureau of Engraving & Printing版别Offset lithography and Recess面值6 ¢ - United States cent发行量53,000,000形式Stamp发行类型Commemorative
邮票信息
| 字段 | 值 |
|---|---|
| Scott 编号 | 1500 |
| 面值 | 6 ¢ - United States cent |
| 发行量 | 53,000,000 |
| 系列 | Electronics Progress Issue |
| 设计者 | Walter and Naiad Einsel |
| 印刷厂 | Bureau of Engraving & Printing |
| 版别 | Offset lithography and Recess |
| 规格 | 40 x 25 mm |
| 形式 | Stamp |
| 发行类型 | Commemorative |