753 is definitely a contact printer. It looks like it may have been cobbled
up out of existing components. The top cover/door has a hinge, which allows
the user to close it part way and observe the alignment of the paper with
the negative. The stand looks very well made, but not quite right for its
use. Maybe converted from a typewriter desk. The inside should be painted
white. The bulbs should all be the same.
754 looks like a tool for loosening the screw tops on bottles, but why the
bent rod hook-hanger looking things? My suggestion is it is for gently
holding the neck on a bottle of cheap wine, so the tipsy drinker has less
chance of dropping it. ;-)