Dan, you have a nice assortment of machinist’s tools. 

The Brown & Sharpe is a protractor head for a combination square. It looks like
it should fit a 12” combo square rule, for measuring and reproducing angles
other than 90*.

Next is a dial caliper that measures to the thousandths of an inch. 

After that we have a surface gauge. Used on top of a surface plate, you can make
a repeatable mark at a set height on your work piece. I’ve also seen chairmakers
use these at the workbench to mark where to level the feet of chairs.

A 3/4-14 NPTF pipe tap (the F indicating it is specified for fuel lines)

The ball peen hammer appears to me to be shop-made.

IMG_5736 looks to be a Lufkin micrometer head.

IMG_5735 is an outside micrometer.

IMG_5734 appears to be part of a Starrett protractor. There should be a blade
that pivots, with a pointer that indicates the angle.

IMG_5733 - I am not sure on this one.

IMG_5732 is a double ended caliper. When measuring wall thickness, you don’t
have to remove the tool from the workpiece to get the measurement.

Cheers,
Alex