Acid Orange and White Sleeveless 60s Dress. 
In very good vintage condition. 
Delicate gathered trim to front lower neckline.
Princess cut style with front side seams. 
A-line shape, rear zip fastening. Unlined
Made for "NPC fashions in Pennsylvania"
No sizing labels but not handmade.
Would suit taller figure. 
Approx Size: UK 12
Measurements Laid Flat:
Pit to Pit: 19"
Bust: 18"
Waist: 17.5"
Hips: 19"
Length: 40.5"