Altair with twin blades.
Magnificent.

Looks like he can't get married now... with only eight fingers.

Altair discovered the way of using the blades with out sacrifice of a finger. He employed the use of dual hidden blades after that.

If he truly used the items he listed in the codex he has the finger.

nighthawk3200 said:
Altair with twin blades.
Magnificent.

It proves that, as Codex pages tell us about the mechanism, Altair was the first wielder of dual blades.

All assassins must hold a phD in organic chemistry!

(No wonder Desmond makes a killer cocktail)