Yes - almost certainly that is a stick mic plugged into a radio mic transmitter body pack (the same or similar transmitter you'd use with a lapel mic).
These days you often see stick mics with integrated radio transmitters (or the horrible 'plug in the bottom' transmitter bricks) but in those days I suspect you had a small stock of body packs and connected either lapel or stick mics to the same transmitters.
The sound person would probably receive that mic with a radio mic receiver on his mixer so he could monitor levels, possibly record effects on a second track (if they had two track recording) or mix in effects (if it was single track) etc. In that they era may well also have been using uMatic VTRs rather than Betacam camcorders so the sound person may have been carrying that too - or there may have been a separate VT
engineer doing that. (When 1" open-reel portable recording was used a VT or Vision engineer was often in the crew to handle tape lacing etc.)