Thanks.
1960s/70s is when, as a kid, I used to see them running around the Amphib Base in Va. Beach, still in active service. But, as you point out, they are a LOT older than that.
Thanks for information about DUKWs still being in use in the 1960s by the USMC. I’ll add that tidbit to my info about it. I thought all the DUKWs had been purged from the military inventory after WWII>