DaveC wrote:

This is a partial wiring diagram for an early 80's (West) German guillotine
paper cutter:

That's a perfectly normal Euro standard symbol for a transformer.

The thing with an arrow it feeds is obviously a bridge rectifier which makes me
wonder if the arrow symbol thingies with 3 connections might be SCRs.

But the rest is extremely odd.

The ?? might be a panel mounted SPCO switch.

And yes, the clutch is in black because it's inductive.

Graham