Random boring anomalies from Sunderland games..

Hit the wall at work so my mate sends me some train spotter random facts involving SAFC games.
1. 73 Cup final yellow ball.. why?
2. QPR home game 1979 when they ran out in our blue away strip
3.Leeds at home 1980 4-1 when all the printed numbers were peeling off the players shirts like a pub team kit!
Sad as fuck I know but anyone got anymore?....