It is not the same for nudes. For example, when this image from Lasse Braun's My Porno Girls magazine arrived in the Inbox, we said, "This unidentified model is probably teaching a massage class at a community college."
A Portland (OR)/Luxembourg-based company called Yurmag specializes in ancient skin mags like this one, many culled from cave drawings and sea scrolls.
European companies like Color Climax, Rodox, Private, Pleasure, and Silwa are featured in their collection, including images of Tiny Tove, John Holmes, Anna Marek, Lisa Lipps, Brigitte Lahaie, Ebony Ayes, and Kristara Barrington.
Yurmag has been online for three years. "We used to (attend) Movie Collectors Shows all over Europe and the U.S,." said Rick, Yurmag's owner. "This was really fun but Ebay killed those shows so we moved online."
"How much porn do you have in your attic?" I asked.
"Basically I'm not a crazy collector," he said. "(Though) of course I keep some for me, especially Seka and Lisa DeLeeuw."
The company buys collections and is always interested in getting IDs on cover models, such as the one pictured (I'd like to know as well, just in case I want to be a massage therapist).
See also: Yurmag