A Trove search has found a advert from late 1945.
I had one of these Stromberg-Carlson amenities sets with New Guinea provenance, a soldier had type written his name and service nr. on the set.
"Purchased from the ACF commissioner at Wewak Sgt. CG Adamson" this set is now in the Aust. War Memorial storage facility. I took the S-C set to Corowa one year and had it receiving, it is the 6 Volt version.
Another amenities set , unknown brand. The leads/alligator clips are for the 6 V lead acid battery
https://www.awm.gov.au/collection/C67407