A large Soviet Reconnaissance Satellite COSMOS 2120 Zenit flown porthole mounted on the wooden base, porthole is 21” in diameter,  3 1/4” thickness, the weights around 40 kg. Comes in special created wooed crate for shipping purposes.

The porthole is made of multilayered high temperature glass with a heat resistant composite and titanium alloy frame, which is engraved with registration, identification and serial numbers. 

The glass of the porthole also has the ability to change colour depending on the sunlight. 

The flown pothole accompanied with certificate issued by the Commander of the Cosmic Units of the Ministry of Defence of the USSR Colonel V.L. Ivanov.

Rare. Great exhibit to any pristine collection.

Some information:

Cosmos 2120 was a Soviet military cartographic photo-surveillance satellite launched from the Plesetsk Cosmodrome aboard a Soyuz rocket on December 26, 1990. Typical orbital profile: inclination 70 degrees with altitude of 350-420 km. Decay date: January 17, 1991. Transmission frequencies observed in West: 19.989 FSK; 39.978 FSK; 232.0 PPM-AM.

 Zenit is a type of military Soviet (Russian) reconnaissance spacecraft launched between 1961 and 1994. In order to conceal their nature, all satellites were launched under the serial name “Cosmos".