Teo Bernatowicz was a decorator from 1973 to 1975. His name also appears as "Bernatowitz" on various websites, but the Ben Harris and Lawrence Illsley book shows the "cz" spelling.
Here is an example of Teo's designer mark from my collection.
1. Double base vase
Here is an example of Teo's designer mark from my collection.
1. Double base vase