In article ,
R.H. wrote:
Just posted another set:

http://puzzlephotos.blogspot.com/

O.K. Posting from rec.crafts.metalworking again.

388) A graded series of points, marked "4" through "20", starting in
steps of 2. (Or is that top one marked "30"? The photo blurs
when I try to make it large enough to be sure.)

My guess on this one is that it is a set of tools for cleaning
carbon out of gas jets, or perhaps for enlarging them in precise
steps.

389) I have three guesses for this one (in order of preference):

1) A reaction jet for moving a spacesuited man during a
space walk. One trigger moves you forward, the other
moves you backwards, and it is powered from a tank of
compressed air connected through the handle.

2) Connects to a source of fire extinguishing foam for
fires on the apron.

3) A gun for spinning up a jet turbine in an aircraft when
powered by ground-based compressor. (But I would expect
some kind of locking ring on the "muzzle" if this were
the purpose.

390) Grinding stone (commonly called a "point", prior to mounting
one end on a steel shank to allow it to be rotated. It looks
like the green stones used for sharpening carbide tools if you
can't afford the diamonds which do the job better.

391) These should mount on the boots of a space suit, and have
magnets secured to the bottom by the Pillips screws visible.
These are to allow walking in zero gravity during space flight.
They keep the wearer from floating off the deck. (Is that
surface on which they are displayed vertical by any chance? Is
there another pair with the other side visible?)

392) This one I *know*. It is a tool for tightening the thin knurled
nuts used for mounting switches, jacks, or potentiometers in
the front panels of electronic equipment. I've even got three
sizes of them of a somewhat different design (split collet with
tightener, instead of this more open style.)

393) A knife used in cutting strips of blubber into "books" prior to
boiling them down for the oil. (The "books" have a strip of the
external skin as a "binding", with cuts down to but not through
the skin. This is after the flensing knives (on long poles) are
used to cut the skin of the whale into long strips as they are
unwound from the carcass of the whale.

As a secondary option, this looks like something used in the
kitchen for cutting thin foot objects like pie crusts or pizzas,
or perhaps for dicing things like onion slices.

Now to see what others have guessed.

Enjoy,
DoN.

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