Took a while to get there....but....
More to follow.
The bottom one is the one I have cleaned up a bit, as you will see in later images, one has the tip broken off, due to too many Tarzan films as a kid, and an over active imagination. (Used it as a throwing knife, not one of my better ideas!) Does anybody have any idea of their possible age?
Ive seen one of these on eBay, that sold very recently, but strangely, the stamp on the blade looks to be rather poorly done, with imprecise placing of letters, also the "Pampa's legs are slightly different. I did wonder if that one was a fake one, as I have read that these Lockwood's knives were copied by unscrupulous manufacturers. Looking again, one can see that the blade stamp is composed of dots! It is totally different.
Here is the picture of it from eBay: