I believe this lady in the bikini is none other than Fanny Fan:
http://hkmdb.com/db/movies/image_detail.mhtml?id=3807&image_id=102897&display_set=eng
And I think there's a good chance that this is Ivy Ling Po, before we got used to seeing her as a guy.
http://hkmdb.com/db/movies/image_detail.mhtml?id=3807&image_id=102890&display_set=eng
Check out this Southern Screen cover for comparison:
http://malaysiaboleh.mybisi.com/product/81238/63-Hong-Kong-movie-magazine-Southern-Screen-60-Ivy-Ling-S2_410875.html
What do you think?