Event covers are decorated, stamped and canceled commemorative envelopes. They are created to celebrate an event or note an anniversary. It explains what is being commemorated on what date, and generally also includes an illustration page.
Ideally, the stamps used relate to the celebration (for instance, space stamps for a shuttle launch). Cancels are either obtained in the city of the event (such as Kitty Hawk for the Wright Brothers first flight anniversary) or, for larger quantities of envelopes, from a special cancellation unit maintained by the Postal Service in Kansas City, Missouri. If a special cancellation (one with a design) has been created for the event, you can generally only receive that cancel from the local post office.
Following is the event cover and it has Gandhi stamp from USA. This commemorative event cover has postal cancelled on March 9 1961 on Polaris Missile Fired at 1pm from Cape Canaveral FLorida with cancel from Patrick Air Force Base near Cape Canaveral in Florida.
In this cover the main important thing to notice is
1) Event. (What is event?)
2) Place of cancellation (From where missile was fired. )
3) Date of cancellation ( Date when event occured.)
4) Stamp on cover (what stamp should be on cover to make it more important).
This cover was not made specially for Gandhi philatelic collection. It was made to celebrate Polaris missile launch so this makes some what important for Gandhi philatelic collection because it was not made with Gandhi in mind. Also this cover don't justify Gandhi's Non-Violence principle which he follows throughout his life so this Missile launching does not go with this stamp.!!!!
Again thanks for reading and please share your thoughts in the comments section
Early usage of 1948 Gandhi stamps
FAKE 1948 Gandhi stamp FDC from India.
Gandhi SERVICE stamp is it REAL or FAKE?
Now let's talk about Polaris Missile launch on this cover.
1961 March 9 - Launch Site: ETR Launch Area. Launch Complex: -. Launch Pad: -. Launch Vehicle: Polaris. Model: Polaris A2. LV Configuration: Polaris A2X-8.
Test mission Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).
1961 March 9 - Launch Site: Cape Canaveral. Launch Complex: LC6. Launch Pad: -. Launch Vehicle: Redstone. Model: Redstone. LV Configuration: Redstone 2040. FAILURE: Control system malfunction during re-entry at 374 sec. Apogee: 90 km (55 mi). Missile test failure. Missed aimpoint by 358 m.
The Polaris missile was a two-stage solid-fuel nuclear-armed submarine-launched ballistic missile (SLBM) built during the Cold War by Lockheed Corporation of California for the United States Navy. It was designed to be used as part of the Navy's contribution to the United States arsenal of nuclear weapons, replacing the Regulus cruise missile. Known as a Fleet Ballistic Missile (FBM), the Polaris was first launched from the Cape Canaveral, Florida, missile test base on January 7, 1960.
More interested in this Polaris missile read following links.