Devin sent me these great pics of his Black Widow.  This unit appears to be a Bartell-made BW, even though the headstock is shorter than is usual for a Bartell instrument.  It matches very closely (except for the headstock length) with the unit found in the 1970 Acoustic catalog and, with the exception of the headstock, tailpiece location, and left-handedness, of the guitar shown in the famous Hendrix pic.  Devin says he purchased the instrument in 2006 and uses it as his main instrument.  The most interesting feature is the metal plate seen underneath the bridge.  I believe this is some sort of stabilization or sustain block and is stamped with the number A206.