Apart from pictures we have some strange things in the archives.
For example a set of these QSL cards from an amateur radio enthusiast:
We also have some indicators of how serious banding was many years ago. This is a copy of a contract with Harold Jackson who joined the band from Black Dyke in 1937 aged 20. He was a pupil of Willie Wood and was a renowned soloist at the time. He was paid £3 a week plus other amounts to play with the band. It may not sound a lot now but it was enough to exist off then. We should point out that £3 a week is infinitely more than any of the current players get paid!
Here he is Harold Jackson, you will see him in some of the band pictures of this era wearing glasses like below: