Original German WWII Inert Butterfly Bomb SD-2 Sprengbombe Dickwandig 2 kg – Dated 1941 Original Items

Original Item: Only One Available. This is an extremely rare 1941 dated original inert German Sprengbombe Dickwandig 2 kg, SD2, or Butterfly Bomb, used during WWII. It has been demilitarized to BATF specifications, and cannot be converted to an explosive devise.

This fine example is complete and empty (non-functional). It has all four wings, though they have significant rust, so the markings that are on the circular wings cannot be read. However, the top of the fuse is marked with 41 in a circle, over ZEIT, for manufacture in 1941.

It has been painted OD green, probably when deactivated, with the central explosive housing being painted bright yellow. It shows areas of rust and pitting, with some small holes, but is in overall good solid condition. These are nearly impossible to find on the market as they are banned from US import, meaning this came home with a USGI after WW2.

The SD-2 was used against British cities, dropped along with other high explosive and incendiary ordnance. A small weapon (about 2kg), its primary purpose was as a booby trap device, to slow the progress of damage control after a bombing raid.

A common configuration for the SD-2 was to load them into a container, holding 23, which resembled a 50kg bomb. When dropped from a plane, the container immediately opened, emptying its lethal cargo.

There were five different kinds of fuzes that could be used for the SD-2 including impact, air burst, long delay and anti-handling. The bomb has a lethal radius of up to 70 yards.

After the bomb is released, a torsion spring pops the wings open. Air drag pulls that assembly to the end of the connecting piece where it locks and proceeds to rotate, unscrewing the threaded arming spindle. Once the spindle completes about 10-turns, it arms the fuze. Once armed, there is no way to defuze the bomb and must be destroyed in place.

“They were found on roofs, on beds, hanging by one wing through ceilings, and the only way for the bomb disposal squads to deal with them was to blow them up with a charge just wherever they happened to be.

“A Grimsby fireman told me that “they tied the whole town up for three days – everything came to a standstill.”

“A German prisoner of war told our bomb disposal people that the Germans dropped some containers of butterfly bombs onto a race course near Paris, in order to give their bomb disposal squads the experience of coping with them. The result was a number of German casualties. Very thorough!”

Commander Sir Aylmer Firebrace, C.B.E, R.N.

Chief of Fire Staff, British National Fire Service

Fire and the Air War

National Fire Protection Assoc. (U.S.), 1946

A Butterfly Bomb (or Sprengbombe Dickwandig 2 kg or SD2) was a German 2 kilogram anti personnel submunition used by the Luftwaffe during the Second World War. It was so named because the thin cylindrical metal outer shell which hinged open when the bomblet deployed gave it the superficial appearance of a large butterfly. The design was very distinctive and easy to recognize. SD2 bomblets were not dropped individually, but were packed into containers holding between 6 and 108 submunitions e.g. the AB 23 SD-2 and AB 250-3 submunition dispensers. The SD2 submunitions were released after the container was released from the aircraft and had burst open. Because SD2s were always dropped in groups (never individually) the discovery of one unexploded SD2 was a reliable indication that others had been dropped nearby. This bomb type was one of the first cluster bombs ever used in combat and it proved to be a highly effective weapon. The bomb containers that carried the SD2 bomblets and released them in the air were nicknamed the “Devil’s Eggs” by Luftwaffe air and ground crew.