All except 1606 are rather wild guesses this time around.
1603 - Some early phony medical apparatus that used electricity to
"heal," perhaps? Apparently receiving the minute current from a battery
via a special brass roller is more medicinal than just holding the
terminals of said battery.
1604 - Driver cogs for a tracked vehicle, replaceable when worn.
1605 - Evidently, a can is placed inside the pitcher and the lid
punctures the top, permitting the contents of the can to be poured out
the spout. I could see something like this having been used for motor
oil (in preference to the spouts that mounted directly on the can), but
the shape doesn't look right for that application.
1606 - Head from a funky splitting maul; the toggles spread outwards and
force the two parts of the log apart. I'm not convinced these work much
better than the usual heavy and relatively wide wedge design, but
apparently some people prefer them.
1607 - I'd guess these are clips to hold a curtain of some slightly
specialized design (possibly for e.g. a train sleeper compartment), but
there are other reasonable options.
1608 - Looks vaguely familiar, but not enough to have an idea as to
application. I'd guess that the cranking action actually operates more
as a jack or winch than to spin the single claw around, but can't prove
it from the picture.
Now to read the other responses.
"He is no fool who gives what he cannot keep to gain that which he cannot
They work Ok on wood that is fairly easy to split. But if there is a big
knot in there or some twisted grain, it is like hitting a big rock. The
vibration and shock travels down the handle into your arms and hurts.
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