This teapot is in the "Katina" pattern which was introduced by Susie Cooper in October 1961. The pattern number is C1160. The backstamp on the teapot indicates that this teapot was made between 1961 and 1966.
The teapot is in excellent condition with no chips, cracks or crazing. There are some small surface scratches to the green glaze on the lid. Please see the photos.