Chigs Baaybee!
Try the MAN plc Archive. They have tons of pix etc. covering all the years. If you need any bits of old desks, they're are at Barton Tower which is kinda nice considering Preston Control was at Barton Hall.
Also, Man City Council have an extensive archive, as do the MEN (a friend dropping in) !!!
Are your knees licensed to wear a Kilt?
Sir George Cayley