One more request, but this involves going back a bit, and it might be too much hassle... if so I understand...
A comparison of the knives we've seen:
1. The one Ben used to stab Jacob (The Incident)
2. The one pinning the piece of tapestry to Jacob's cabin wall (The Incident)
3. The one Jacob was using on the fish in the first scene of The Incident.
4. The one Kid Locke chose from the items Richard brought him (Not sure what eppy?)
5. The one Ben gave to Locke to use to kill his father (if he did in fact give him a knife? I guess this would be in Man From Tallahassee?)
6. The one that Will Turner's dad gave him which he ended up using to cut out Will's heart so he could take Davy Jones' place (OK, just kidding on that one...)

Anyway, if they are all one and the same knife, it would be interesting to try to figure out who was the original owner, and how it gets passed along... Thanks!