Actually repousse is from the back then front.   
 
But with the close ups I do agree David that this baka-baka is acid etched.  As Chopstick_minh said the designs are not deep enough. 
 
On the blade itself, the work is most likely chased with tempered steel tools (though sometimes engraving is done....)
		 
		
		
		
		
		
		
		
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