Search:

History Revisited - Medieval Arms - Roman Medieval Chainmail Helmets Swords Celts Vikings Shields Armour
Scrimshaw Tusk Ship James Allen Faux Ivory 1830 (05/13/2007)

You may want to check these....

Not arguing with you. But with date, ships name etc. It might have some historical significance.

If you have money to burn go for it. If it is indeed preban and by a known artist it could be worth quite a bit.