One last thing about this ball. I've realised it is almost 80 years old
These very old balls are very difficult to find in this condition. Even if you are lucky enough to find an unused example, the balls often deflate and lose their shape. So to find one like this is great, probably why I like the photo above so much.
A couple of the balls in box have been nibbled/eaten by moths. It seems to be a big problem in the UK, I don't know about other countries? Moths really like to eat the covering of tennis balls annoyingly. Can anyone please recommend a good effective way to keep my tennis balls protected from moths?