Penny Ellington was born in the summer of 1950. In 1974 she began working in adult films and appearing in magazines. Much of her work has been lost although I did find one movie with her in it (see below) and some old scans.
Her career was short, only from 1974 to 1975, and she changed from a brunette to a blonde. She also modeled under the names Penny Pontoons and Tupence.
The two movies I could find her listed in are Reel Classics No. 3: Volume #23 and Reel Classics No. 1: Volume #14.
Her boob size is listed as a DD but I agree with the guy who requested Penny, she looks much bigger. I would put her at an F cup. Either size she has some great looking heavy, natural tits and a curvy body.