Windmill Water Pump Original Sculpture copper wood signed 1978 Mike Hinz Heinz ?

This vintage sculpture from the 1970s is constructed of copper on a wood base.  The windmill sculpture is a carefully crafted working “model” of a water pump windmill.  This small windpump has moving parts --- although, of course, it is not pumping any water into the round copper tank.  The copper sculpture is on a wood base; it is a cross section of a tree or shrub branch or trunk (it looks like cypress).  The wind pump is surrounded by a fence – with three horizontal rows of copper wire (strung along the fence posts). This agricultural  / farming / ranching icon has been in our collection for almost twelve years.  We purchased it at an estate sale in the Virginia suburbs of Washington, D.C. It is signed on the bottom and dated 1978.  It is most likely by an American artist / craftsman.  The signature appears to be Mike Hinz (but perhaps we are misreading the last name).   The artist’s / sculptor’s / craftsman’s work is exceptional.  It is fabricated from copper wires and tubing (of