Awesome picture! (Though it wasn't the pipe that held my attention so much... I was checking out his wife's stems, not the pipe stem!)
I don't want to get too 'CSI' about it, but the bowl is very shiny and in general the pipe seems either newish or recently maintained. It's probably his only pipe, maybe one of two. But look at his and his lady's attention to detail: the groomed moustache, their tidy hair, her spotless dress, in spite of their rough emcampment... maybe he didn't lovingly polish his briar each day, but I can imagine him taking it to the store for regular touchup maintenance and buffing. So the pipe may predate the picture substantially.
It was probably by necessity an affordable pipe, somewhere in the $1-$2 range, judging by
this 1939 Wally Frank Catalog. Either an house-brand pipe from the tobacco shop, or the low-end of a large manufacturer.
The biggest hint would be a visible stem logo, of which there's none I can see. Maybe it's a replacement stem. Or perhaps the band (nickel or silver) is part of a repair--if there's a stem logo, the aftermarket band may be covering it. With the contrast in the picture, and a dark-finished pipe, markings on the wood are lost.
In any case, it's tricky, since a "house brand" pipe bought at the local tobacconist might've been made by a name-brand manufacturer. I have a very similar pipe of that era, made for a large chain tobacconist by BBB, but their logos appear only on the shank, not the stem.
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"Never praise your Cider, Horse, or Bedfellow."
-Ben Franklin