This sabre is an unknown European piece I believe may be Belgian or Bavarian. It has been suggested it may be Dutch or Russian. The sword is solid and has a French style hilt and a long curved pipeback blade. I would assume the sword was made in the early to mid 19th century in Germany. The sword is solid and there is a slight gap between the grip and backstrap as can be seen in the images.
The sword can be yours for £275 or best offer.