Boeing 707 & Humber-Sommer
Technical Data
| Stamp Set | 50th Anniversary of First Airmail Flight |
|---|---|
| Date of Issue | February 18, 1961 |
| Denomination | 15 nP |
| Quantity | 2,500,000 |
| Perforation | comb 13 x 13½ |
| Printer | Security Printing Press, Nashik |
| Watermark | Asokan Capital Multiple [Up] |
| Colors | Deep green | Grey |
| Catalog Codes |
Michel IN 321 Stamp Number IN 337 Yvert et Tellier IN 10 Stanley Gibbons IN 435 |
| Themes | Aircraft | Anniversaries and Jubilees | Aviation | Postal Services |