There are a bunch of malleable iron tools with that mark that all came out of Chicago. "Bus" Haury found some attributed to Chicago Hardware.
Could you show a full view of the lifter? I'm working up a "valve tool special" (based on 1913 & 1917 MOTOR WORLD articles) to accompany the March MVWC Newsletter & that mechanism looks like a common one that I might be able to identify the "manufacturer" from a full view.
Regards, Stan Schulz, editor Missouri Valley Wrench Club Newsletter