Yvsa, this is purely a guess on my part but I tend to believe that the center khukuri is the grandfather of today's Ang Khola.
And, Mike, WOW is what I thought when I visited the museum first time. They have some wonderful old -- ancient! -- examples there and I must dig thru my file of 10,000 and post a few more.
Interestingly, pictures of displays are usually not allowed and all cameras must be checked with museum guards before entering the museum. My brother-in-law, Jeevan, was able to convince officials that a few pictures of the displays in magazines and newspapers could only help and the officials agreed with him. His argument along with a nice "donation" to the museum is how we got the pix.
Uncle Bill