Korea 1951 C rats, but I think there were at least two different packaging of them. One and the most common was the individual man's rations in small cans. There was for a short period of time, some squad packs, for up to 10 men to eat, mess hall style. Now you old guys were mentioning the Lucky Strike Green cigs, there was also Camels, Wings, Phillip Morris, and Rawlies. The later ones included the longer Pall Mall brand. I made a move just about 5 years ago, and found a forgotten full case of C rats, vintage 1948 Most of the food items had dried up, but the peanut butter, choclate bars, and of course the crackers were still as edible as they had ever been. I did prove to my Grandkids you could still smoke those old cigs, if you did not lose all of the tobacco out of the paper getting them out of the small package. Just wet one end, turn it around and light that end, and you can usually touch both ends of the cig together after 2 or 3 drags. As for the P 38 can opener, saw someone advertising them not too long ago, for $5 for 6 of them.