Objects
Deadeyes (above and right) and blocks (below) were used in the rigging of old-time sailing ships. In either case, the purpose was to gain mechanical advantage through the use of compound pulleys. This was especially necessary in the days before powered winches, when the only working force onboard was literally manpower.
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While not exactly shipwreck artifacts, lobster traps, scallop dredges, and other fishing equipment are not uncommon sights on and around New Jersey shipwrecks.
Lobster Traps
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What I know about antique glass bottles wouldn't cover both sides of a matchbook. But here are some excellent links on the subject, so you too can learn the difference between a pontil and a blob:
Miscellaneous Links:
Right: Plastic Coke bottle with screw top
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