Vintage Handmade Studio Pottery Tea Set

This vintage tea set features a rustic, earthy design with dark metallic glazes contrasted against raw, exposed clay mountain motifs at the base.  It includes a classic overhead-handled teapot and three matching mugs.  This style draws inspiration from mid-century North American studio pottery.  It was crafted  in 1975 from the date on the bottom.  I am unable to identify the artist's name on the bottom of the mugs only the date.  The teapot is 4 in height not counting the handle and the mugs are 3 tall.   I am the only owner of this set and it was rarely used.  The set is in excellent condition.  No chips or cracks.