Its a lovely piece Lew!  Id say your probably right in your date estimate, But at the very least certanly from the c.1900 to .c1930 era to my understsanding. 
 
I like the shape & style of it. 
 
The scabbard is also well made, so are {as Norman noted} the small knives. Id guess the handle is Sambar antler thats ground & polished, but could only be 100% certain in hand. 
 
Berk I agree to date that most buttplates seem to appear on Wood or horn handles around c.1900   I know of 2 earlier than that, one in a Nepali collection & one a very unusual Indiam made presentation piece sold in auction in England about a decade ago, But I think they are both exceptional forerunners or possibly in the case of the Nepalese example carrying a later repair or even some accidental confusion in its identified history.   
 
Yours looks a very dignified kukri. 
 
Spiral
		 
		
		
		
		
		
		
		
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