The A3PBE1-600G-11 is a 2-position momentary push button with an extended green actuator, wired 1NO+1NC. It's a standard panel-mount control station component — the kind you'd find on a machine start/stop station or a conveyor jog panel. The extended actuator gives a positive tactile target for a gloved hand, which matters on a production floor where operators aren't hunting for a flush button.
The description repeats the same configuration twice in the record — PB 2POS MOMTRY EXTNDD GRN 1NO+1NC — confirming the 2-position momentary action, extended green operator, and one normally-open plus one normally-closed contact block. That's a common contact arrangement for a start (NO) with a feedback or interlock (NC) in the same device.