"Kesslere," it says - and that name probably meant something to the regular consumer of these mags. As this site on Broadway photographers says:

"An aesthete, snob, bisexual libertine, and party-giver, he became an important figure in consolidating the cultural connections between the homosexual arts community and high society in the period between the wars. Noticing the vogue in the cultural magazines for hazy photographs of nude dancers, Kesslere in 1923 began developing a series of paintings and pastels of diaphonously draped nude girls running in the open air. "

Known also for heavy retouching. Is that the Delaware Water Gap? I'm not sure, either.