1831 Pattern General/Staff officer's mameluke sword.
 

Dear friends. I want you to ask:
1. Till what time general mamluke sword belonged staff officer?
2. Who knows a plant being in a wreath? Also what the wreath designates?
3. Who knows the information on manufacturer HERMAN and Co CALCUTTA?
4. During what time this sword has been made?
Respect, Alexander.

Hello Alexander,

The company is Harman & Co. from Calcutta:

"Harman were Military and Civil tailors in Calcutta. Harman & Co., 11 Gov't Place. Some of their swords they sold were made by Mole." (Robert Wilkinson-Latham, 2010)

Here's another but very similar example - makes me wonder though...
http://www.worthpoint.com/worthopedi...ke-dress-sword
"This is a Very Rare and hard to find British Model 1830 Mameluke Officers dress sword that originally came from an auction. The stamp on the handle represents the date, April, 1837 and was made by Harmon & Co, Calcutta, India. The hilt or grip is missing the ivory slabs and was auctioned like this orginally. T is no scabbard with the sword . Note also the damage on one of the languets. On top of the blade is the inspectors mark which is very common for military swords. The overall length of the sword is 37 1/2 inches by 5/16 inch thick by 1 1/16 wide at the guard. The guard, mameluke, is 5 inches by 5 inches including the handle." (Sellers info from eprey? Citation and pic attached for future reference and academic discussion.)

Regards,
Kai