What are these?

I won a CSS at auction and one of the photos has these in it, which don’t look like a CSS part and don’t even look compatible to be honest.

Any ideas? The CSS is from the estate of a Herman Miller director who worked there in the 60s so maybe it’s HM related?

Any tips appreciated.

I won a CSS at auction and one of the photos has these in it, which don’t look like a CSS part and don’t even look compatible to be honest.

Any ideas? The CSS is from the estate of a Herman Miller director who worked there in the 60s so maybe it’s HM related?

Any tips appreciated.