Paul,

I agree with you in thinking that the cat's head without diamond was the earlier of the two marks. My belief was only based on anecdotal info & in seeing what I believed to be earlier pieces with that mark. I do know it's a point of contention with some collectors though.

Here's my only KM dagger.

1.JPG (112.54 KB, 198 downloads)

GDC Gold Badge #290
GDC Silver Badge #310