Yes they are. My dad got a set of them way back in the 70's. I took a pair when I left in the 80's, been using them ever since. Found the second pair in an unopened box when we closed down my parents place after they passed. Gave them to Scott. Felt guilty that my other son would not have a pair so I sharpened my google fu and found a third set. May need to look for a 4th set because mine are beat.