Looks alike a Hollywood 50s movie. Definitely was black/white.
Plot: Some prisoners tried to escape by digging a cavity just using some food spoons. Finally, they did the job. Although they found a way to a sewerage manhole cover within a street but they didn’t escaped at that moment because they decided to return to prison for just one more night and wear some nice clothes or something like that before their escape which seems definitive.
Unfortunately at that night one of them reported them so they failed to escape.
casspir Answered question Feb 12, 2018
the only film I can think of is the great escape hope I’m right sounds like it not sure thou
casspir Edited comment Feb 12, 2018
The “The Great Escape” is not black and white, it is a color movie, and some of the questioner’s description does not fit this movie.
See if this list jogs your memory:
https://www.imdb.com/list/ls004816184/