The top photo, the block with a V in it is a 'Vee block'...... Its got another part that's shaped like horse shoe with a bolt stuck in it
If you put a peice if round bar in the Vee block and use the thing to its right, the scriber block to scribe a line across the end of the round bar, then turn the round bar and scribe again, do it a third time and you will have marked the exact center of the bar.
The horse shoe thing, its ends slide down the grooves in the sides of the Vee block, the bolt is done up and it locks the round bar into the Vee block.
The DTI, dial test indicator, its got a stand for it that looks like the scribing block, with a magnetic base though.
Its used to test how far out off center a peice of round bar in a lathe chuck is.
Or to make sure a workpeice is sitting flat in a milling machine, keyways and cutting splines on a shaft.
The things with a 'thimble' on them, marked with numbers, that go 'click click' when you turn them sometimes, are inside and outside micrometers, to accuratly measure indside and outside diameters.
They are sometimes used in conjuntion with the calipers, compass looking things.
The tapered metal thing with a slot in it and a flat bit on the end, is a 'morse taper' there may be a number stamped on the end.
It holds tapered drill bits in a lathe.
You should have no problem selling them to a home machinist on
ebay or such.
There's some 'high speed steel turning tools' and a ' taper pin,' some square rod for keyway keys or such too.
Lay it all out flat and photo it. One item can be worth alot.
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