Hi I was just given a old little 6" pipewrench. It is a Ridgid. Embossed on one side of the handle is RIDGID. Pat. 1727623 6. On the other side it reads RIDGE TOOL CO. ELYRIA O. U.S.A. On the movable jaw one side it reads B-12-4 OIL HARDENED 6". The other side reads 1/8, 1/4, 3/8, 1/2, 3/4 RIGID(stylized "logo" font). Any ideas on age etc. Thanks Steve
