this is the best one i managed to find on ebay, Half crown of Charles II, so there is a base for you. I would imagine there to be some documentation on the number of each denomination found, and having a quick look about the wreck find itself, that was 1967 and it contained Gold as well as silver, even pieces of 8. so basically anything from sixpences up from any date from milled I would Imagine, as well as trade currency.