The Departmentstore Santas' LP is an underground rock classic of the highest order – from its carnivalesque front cover to the sixteen home-schooled tracks contained inside. Information about this mysterious band has been as scarce as original copies of their self-released album, yet purveyors of lo-fi pop esoterica have whispered about the Santas' raison d'etre for the better part of the past three decades.Recorded in the early '80s in La Mesa, California, At The Medieval Castle Nineteen 100-Ye…