I'd say with 95% probablility that they are Spanish olive jars. There are many on display here in museums dating from the mid-1500's to the late 1700's with little change in the overall design. If I recall correctly, they were rounded on the bottom so that they had to be shipped on their sides to keep the cork and wax stoppers from drying out. I believe at least one of the displayed jars here contained figs. If not Spanish, I would say that Portuguese would be the next strong contender.
Also known as "olla" or olive oil jars. Olive oil was a staple of early trade, and continues through today. Also a diet staple at the time (16th-18th centuries) as well as earlier.
My thoughts, I would lean towards Mexico as to where they may have been produced, circa pre-1700.
Common trade goods...to many Countries that sailed into Vera Cruz during the "trade years"
My guess.
Very nice, so you have 5? That is odd, would you care to have 4? Jus asking.
100% Spanish jars.....actually the kings of Spain at that time, both Philip iii and Philip iv owned the 'patent' to them and that 'pinkish' color glaze that they used. They also traded them all over the world so..i.e. made by the Spanish [ they produced them in many locations includung Mexico] but could be a shipwreck from another nation who purchased them. So the wreck may not be Spanish. Very nice condition ! Great find!
Great find! Man do I miss diving in Belize. My friend Tulu and I have spent many hours underwater together off Turneffe, and a little known area near Cay Caulker that was most interesting. ;-) I'd do some digging around there for sure, congrats and keep it up!