Warren's post on his Sudanese arm dagger got me looking back on my own daggers.
On one side it says "Al-Kartoum 1317/1900" (top pic).
The opposite side has "Umdurman", and then it has the Hijra date "1100", which would translate to 1688 or so. This doesn't make sense to me...help please.
Furthermore, there is the number 90 just on the other side of the fuller.
Emanuel