Illustrating the entries in C of A Applications p.50/81 is this unserialled Portuguese Avian Seaplane at Hamble.
Clang! Apparently no-one (except George Jehks) noticed the incorrect caption to his Portuguese seaplane photo on page 81/112. It was of course an Avro 626 and not an Avian!

Самолёты на фотографии: Aircrafts on the photo: Avro Tutor/Sea Tutor/Prefect / Type 621/646/626 - ВеликобританияUnited Kingdom - 1929