Heller Masterench Adjustable Wrench 8 inch

This is a nice clean example of a Heller Brothers 8" spring loaded, self-adjusting masterwrench (pipe wrench). It has a spring loaded jaw that adjusts to the smaller pipe sizes as pressure is applied to the handle. The serrated jaws are in good condition like the rest of the wrench. It's marked "8" MASTERENCH CHROME VANADIUM" and "on the other side of the handle cutout area.  also has patent dates on it, "HELLER BROTHERS CO NEWARK N.J. U.S.A. MADE IN U.S.A. PAT. 4.14.25  7.5.27  11.12.29. The trade name sounds like Masterwrench, but the WR is dropped in the actual name. There is also a Heller logo near the name (standing horse). This wrench appears to have some wear, mostly seen as tiny dings in the serrations of the jaws, a few tiny chipped off areas at the tip of the spring loaded jaw not bad, still plenty there to grip the pipe. A nice clean older wrench, some very minor staining or darkening to the finish, no rust, straight not bent, in very good working order with a strong adjustment spring!