Large Antique Mid 19th Cent Silver Mounted Steel Bladed Birman Dha Dagger Knife

The Dha is the national sword of Burma, but also used by nearby countries. 
This nice example is much probaby from the Shan people of eastern Burma. The scabbard is of wood encased in near-pure hammered sheet silver decorated with applied silver filigree in bands and in swirled geometric motifs. 
The single-edged, curved steel blade fits snugly into the scabbard. 
The handle comprises a short segment of silver decorated with further silver filigree bands. 
The scabbard retains its original cotton twisted rope fastened with a knot used to attach the dagger to the wearer’s waist. 
The silver scabbard and hilt mounts are nice quality, in good condition with a lovely subtle patina to the silver. The blade is in good condition with staining and some scratches. The grip shows a rich honey coloured patina with small non-displaced cracking, both commensurate with its age. 
46 cm long including scabbard
Scabbard is 30 cm long by 4,5 cm wide
The grip has a circumf. of nearly 10 cm
The knife has not been cleaned, buffed or otherwise modified