I still carry my father's P38 in my wallet. It's probably about 50 or so as well. He fought in WWII, Korea, and Vietnam so I'm sure it came from one of those. I have his US Camillus multi purpose knife as well. I've used the P38, and the can openers on the Leatherman, Wenger SAKs, Victorinox SAKs, and the Camillus. They all work about the same to me even though each one is slightly different. If I had to pick one though, it would be the Camillus. It's the largest of the bunch and gets the job done a bit quicker. Close second would be the Vic, Leatherman, and Wenger. Last would be the P38, only because my old hands are not so good for holding the tiny lil bugger anymore.