Vintage silky striped top with tie at waist

Hello, Carol Brady? Fun bright vintage sleeveless top. Yellow, black and white stripes with polka dots and flowers. Zip back, mandarin collar. Tie of same fabric can be worn or not for a different look. Alex Coleman in the 1970’s was one of the largest womens better clothing manufacturers. Size tag is worn off but measurements seem like a M? Not stretchy.Some staining in the armpits.