Thud and Blunder in "Knock-Off Time"
- Blwyddyn: 1964
- Gwlad: United Kingdom
- Genre: Animation
- Stiwdio: National Coal Board Film Unit, BFI, TVC London
- Allweddair: safety, coal mining, miners, civil disobedience, collier, psa, public information film
- Cyfarwyddwr:
- Cast:
