Original German WWII Butterfly Bomb SD-2 Sprengbombe Dickwandig 2 kg - Restored Russian Field Gear and also indicates that this

and also indicates that this is a Cavalerie Sabre Modèle 1822 (Cavalry Saber Model 1822)

so the years of cleaning have removed it

A transitional model

as very few survived the 200 years since being introduced

It is also marked with the original manufacturers information as well:

Original German WWII Butterfly Bomb SD-2 Sprengbombe Dickwandig 2 kg - Restored Russian Field Gear and also indicates that thisOriginal Item: Only One Available. This is an extremely rare original inert German Sprengbombe Dickwandig 2 kg, SD2, or Butterfly Bomb, used during WWII. The name in German literally translates to "Thick walled Explosive Bomb." This is a complete and non functioning example and is in compliance with the BATF guidelines on ordnance. Not Available For Export This fine example is complete and empty (non functional). There is usually markings visible on