1980s. Originally designed for and distributed in the K-ration , it was later included in the C-ration .The device can be easily attached to a keychain or dog tag chain using the small punched hole. copied from http://www.sulit.com.ph/index.php/view+classifieds/id/5796314/P+38+MILITARY+CAN+OPENER Message to be posted (Required) What do you think about this ad posted