Hi Bill
I did a little research on Kalemyo 1890 (A small town in Burma). It seems there was some type of small war fought between the British and the Zomi or Chin peoples between 1888-1890 in that region of Burma. So my guess is the sword was either a battle field pick up from that war or a surrendered sword from a ranking officer. Here is a link you can look at.
http://www.lairoham.de/Facts%20about%20Chin.htm
Lew