Thanks Emanuel & Lee.
Here is a round the world trip.
From blade markings in other links about these knives there is this Kaskara with similar blade stamps;
http://www.vikingsword.com/vb/attach...id=94044&stc=1
For the Dao looking axes here is a very nice unmarked example with the sale collar;
http://www.vikingsword.com/vb/showthread.php?t=5759
With this knife type we discuss and that these things have carried similar marks, Ivory, Africa and circles brings me back to Africa, but wait there is more
Although not identical, the deep stamp markings are interesting on the Sudan dagger in post 15 by Lee
http://www.vikingsword.com/vb/showthread.php?t=111
Then I see Jen's post in 10 & 13
http://www.vikingsword.com/vb/showthread.php?t=3481
Which is clearly from India
So a short trip around the world, India or Africa...I still feel my bones Africa but British India certainly had the Tooling abilities to turn these out too..
Ponderous
Gavin