Though my heading reads "Colleen's Portfolio" what is really shown here are her "composites", which are a kind of miniature portfolio. The composite would be periodically updated (I don't know how often), and in this section are three examples of Colleen's composite at three different points in her career.
"A scrapbook of good pictures is assembled. Out of these pictures the agency will select several to put on a 'composite', the models calling card. A composite is a mass-reproduced print of a collection of photographs showing the girl in full face, in profile, and in various moods, and is left with each client to be filed for future reference."
- Eileen Ford, Secrets of the Model's World (1970)
"In California, a model has four different poses taken. The best of each of the four is then reduced in size so that all four fit on an 8 by 10 inch glossy print. This final picture, or 'composite', is sent around to all the photographers who are potential employers."
- Terry Reno, The Model (1967)