THIS IS  VALVE SPRING COMPRESSOR IS MARKED MAC MADE IN U.S.A. PAT. NO. 2 119 128. IT IS A MODEL CF-49A.  THE HANDLE TURNS FREELY AND THE JAWS OPEN AND CLOSE COMPLETELY.  HAS SOME WEAR FROM USE, I CLEANED IT WITH DAWN DEGREASER TO SEE THE WRITING ON IT OTHER THAN THAT RIGHT OUT OF STORAGE WHERE IT HAS BEEN YEARS.