Shadow Model 44 Buckaroo Humbucker for acoustic guitar 1980s old stock w box

This is a Shadow 44 sound hole pickup for acoustic guitars (with a normal sound hole size, will not work with oval holes).  When I got this  it was still sealed, even though I think it was bought in the 1980s,  until I opened it up to take the pictures and test to make sure it works.  It's complete with the cord, allen wrench and the single metal spring that you use to install, along with the instruction sheet.   Nice humbucker with volume control wheel for flattops.   Shipping will be $5 in the US. Thanks for looking!