A
possible aka for Allan Sass may be Victor Bruun.
In
Antonia Burton-Smythe's thread are pics. from a couple of settings. The barn & riding "pink" (clothing, not colour) session shown in Mayfair 22-12, 1987-12, is credited to Allan Sass. Likewise Rikke in Sexy's Traumgirls, 1993, by Sass. Several other mags. show pics. from the same barn setting but we don't seem to have photog. credits for them.
In a different setting, with a yellow top and yellow-wheeled roller-skates, Moewig credits to Sass while Se og Hør (Dk), 1987 credits instead to Victor Bruun. They also name the model as Rikke Sørensen, which may yet prove to be a better name for her than the one-off Mayfair handle of Antonia Burton-Smythe as a couple of Moewig mags. also called her Rikke.
I have seen the name Victor Bruun several times in various mags. but do not currently have a proper grasp on his work or "era". There are three credits of his from Fiesta dating from 1977, while his first Mayfair credit is 1979. Those are the earliest instances I currently know of, but there may well be many others and perhaps earlier.
Yes, it's possible that there was a mag. credits mix-up. It's also possible that Sass purchased these pics. from Bruun... or even perhaps the other way around with Bruun as the purchaser, but the Se og Hør (Dk) credit to Bruun dates from 1987 which to me makes it rather different from when the conflicting/contrasting credits are on a current website--even sometimes from a website where there is some set code/number or other such signal acknowledging the different photographer source.