I believe this vintage photograph of six naked men may date from the 1930s. I found it on Usenet and it came with a filename suggesting that these were military men getting some R&R:

nude soldiers after swimming

As I sometimes do when I have an attractive and somewhat unusual image available in fairly high resolution, I cropped and uploaded a couple of versions in sizes suitable for use as Windows wallpaper:

Six Nude Men (800×600)
Six Nude Men (1024×768)

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