Thud and Blunder learn what not to do while in a coal mine.
| Release Date | January 1, 1964 | |
|---|---|---|
| Status | Released | |
| Original Title | Thud and Blunder in "Knock-Off Time" | |
| Runtime | 2min | |
| Budget | — | |
| Revenue | — | |
| Language | English | |
| Original Language | English | |
| Production Countries | United Kingdom | |
| Production Companies | National Coal Board Film UnitBFITVC London | |