What is this Inspection Kit?

[kazoobag]

I need help to identify this tool
What is it?, and how does it work?

Thanks.

[Kelly_Bramble]

Looks like a limited dimensional inspection kit that is missing the dial indicator.

Top left are likely ring gauges, the pins below are tapered pin gauges and various tool to interchange the pin and ring gauges with the Vernier depth micrometer.