This is a hard to find automatic adjustable wrench marked "BULLARD WRENCH NO. 2 PAT. OCT. 27 03" on the handle area.  This No. 2 size is 12.5" long and appears to be made to use on pipe up to 1.7" diameter exterior.  It is spring loaded to the closed jaw position, but the pivot position design gives maximum leverage and gripping power.  This is the medium size, there was also smaller and larger versions of this same wrench.  This wrench is in nice clean condition with some wear on the jaw grippers noted, otherwise very little wear.  A few of the sharp points of the jaw grippers have been chipped off near the edge of the jaw, not enough gone to cause any change in use.  This is only seen on the replacable jaw, so if you were able to find a real good replacement jaw this wrench would be in fine working order. The spring and pivot are in great shape.  The automatic system works very smoothly as it should.  Quality made in the U.S.A.!  There is no rust, cracks, or damage.  We do note a few tiny dings and scratches near the main pivot pin mostly, but does not effect function.  The nicest I have seen in this size!  A very unique wrench, truly a hard to find collectible!