Vintage Military Style Clasp Knife

I must be honest, I know very little about this knife, there are no makers marks anywhere but I'm pretty sure its Sheffield made. Construction is all steel, the body being made of slabs about 2.5mm thick. The shackle however is copper and of the type fitted to British military knives in the late 19th early 20th century. Snap on the blade is strong with no play, the marline spike has decent snap & a little sideways movement. Guessing the scales were polished but I like them the way they are. 
Blade length approx 80mm. 
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