Hello there. Web Search sunken ships- Mary Rose this might lead you to where you want to go.
if not there are the Bottels & Black Jacks Mugs that were on the bottom of the ocean floor
that you can see what you are wanting to copy. hope this helps.
I i were you i would go to the Tandy Store and look at the Books of leather designs
i bet you would would find some designs of your liking......I M H O.
then again why not just get your brand tatooed ?