Vintage 70s black cotton Koret of California blouse and skirt set.  The pattern is an ethnic or geometric print in red, brown, yellow and black.

The sleeveless blouse has a wide flared collar.  It has a large black button closure on the front, along with a hidden smaller button closer to the waist.  

The skirt has crystal like pleats and an elastic waist.  It has a label from a theatre production inside the waist.