Hmm this pic looks a lot like the one I poster already on this site lol.
I got this from the Pirates Wiki. It's a really useful site although since they've changed the layout I found it less user friendly: http://piratesonline.wikia.com/wiki/Main_Page
If you need, there are tons of spoilers on there including the step by step instructions for the entire Raven's Cove's quest. Most if not all the weapons are posted on there so you can compare how the weapon you have already ranks against all the other similar weapons in the same category.