It's been a long time since I've seen a case of C-Rations being opened. Here's a video of a case of 1969 C-Rations being opened:
They missed using the flash suppressor prongs of an early M16 rifle to twist the wires until they broke.
I miss those can openers! We, Canadian Army circa 1980, ate lots of those left-over Vietnam-era US c-rats.
"The Fruit Cake looks to be in good shape..."
*chuckle*
The one sure thing is the John Wayne toilet paper will last until the end of the universe.