My father told me the first two were brought over from Africa by missionarys they were given to my grandfather when my father was very young.My father passed away in 2001 at 87. My guess is they are better than 100yrs old. The other three were given to my dad by the widow of a oil man who worked the middle and far east in thr early years of oil exploration in that area.I was told the third knife was purchased in Saudi Arabia,the fourth was given to him by an Arab oil feild worker in Iraq,the fifth he got in India but I do not know the history. I have other pics I'll post Tonight when I have more time.