USMC artillery radios

I found this doing a Google search. The radio set looks like an SCR-300.

SCR 300 is also what I guessed. Yet I can't see the radio unit, only the operator with headphones. I might have to go ahead with my guess

It did, also in the Airfix boxing, something the size of a shed & sat on the trails when in transport mode.

... I can't see the radio unit...

It's a posed pic.  Notice all the smiles for the benefit of the folks back home?  My money says the talker's headset and microphone are not plugged in.

I came up with these two radios used by Marines on Iwo. But I do not know if they would be used at the Artillery battery and position level, of just if those would have field phones linked in to the Fire Direction Center where a non man portable radio would be used.

SCR-536 "handy talkie"

SCR-300 Manpack type

Actually, the headset/mike setup shown are more than likely to hooked up and working - the radios are not located at the tubes, rather in the TOC (Tactical Operations Center).  That's why artillery batteries used to have Wire Commo Teams.

So, the headset at the tube connects by wire to a radio at the TOC some distance away?

But wire hooks into phones most of the time. Unless you are using a remote set up like a AN/GRA-39, which: 1) I do not know how old it is, and 2) is a speaker and mic set up, I do not recall it having a head set capability... (yes I spent many years as a commo sergeant, and some of our gear was pretty old school)

The mic/head phone in the pic appear to be one of the old (new in those days) voice operated units preferred by the navy aboard ship - it generates its own power when you talk into it - good for about a 1/4 mile or so thru wire.