A gorgeous silk, tricolor color-block ensemble.  The blouse is a classic YSL blouse with full, 3/4 length sleeves and a v-neck.  The skirt has three large ruffled tiers.  Navy, brown, and black coloring.  The skirt closes with a hook at the waist and a side zipper. 

The same ensemble (with a different color top) is seen on the Spring 1980 runway.

DETAILS:
Label: Yves Saint Laurent Rive Gauche
Fabric:  Silk
Circa:  Spring 1980s
Condition:  Overall excellent .  The dress set shows light, normal wear, with no specific issues to note. 

MEASUREMENTS 
TOP 
Shoulders:  14"
Bust:  39"
Waist:  38"
Length:  22" 
Sleeve length:  17"
Marked size 38

SKIRT
Waist:  27"
Hips:  41"
Length:  34"
Marked size 40