Model 15 teletype machine at the Brisbane US Army signals centre WW2.
The PMG here used large numbers of these machines, and they were very popular with ham radio guys, I had one, but I didn't get it working on air. The RTTY mode enabled radio transmission of messages...
The device next to the 15 is a tape perforator or reader. It punched holes in a 1 inch paper tape .
https://collections.slq.qld.gov.au/viewer/IE1107273