No. 11 in the popular and collectible ‘The Observer’s Book…’ of series published by Frederick Warne.
This book inside is in good condition but the cover and first few pages show their age with well worn patina. First published in 1949, this edition is the tenth print dated 1961 . No dust jacket, leather texture cover.
Read more about the book series here https://en.wikipedia.org/wiki/Observer%27s_Books
The Observer's Book Of Aircraft - 1961