when I used the images in my previous posts, I did not mind about the dates. I only used them as representations since I had no idea about the exact dates the artifacts were made. So when I use the images of Indian swords and yataghan, my concern is mainly to show what they look like.
so far the oldest illustration of yataghan i read is the one in Richard Burton's The Book of the Sword, 1884, where the bird or sarimanok motif is evident.
Dating krises is really problematic. Without the use of carbon-dating, we can only get estimates, and sound estimation can only be done if the survey of krises is counducted according to groups. Sulu krises should be treated as one group and lanao's as another one, and so on and so forth.
Another proof of Turkish and Tausug's meeting of cultures:
There is a dance in sabah popular among tausugs (or suluk) called daling-daling-- it is a combination of arabic belly-dancing and indian classical dance. Not only did sarimanok motif come from turkey, daling-daling too was influenced by the turkish belly-dancing called chiftetelli.
I just compared the musical beats and dance movements in both dance forms, the similarities are pretty obvious.
I have always believed that to really understand the origin of a weapon, a general or holistic study should be done-- art, folklore, genealogy, genetics, geography, metallurgy, woodwork, warfare, spirituality, etc. That's what I want to attempt.