Butterick 4490 vintage sewing pattern, dated 1976.

Misses Blouse:

Loose fitting blouse gathered into one-piece yoke has front-buttoned band closing, full length sleeves gathered or pleated into buttoned cuffs, shaped or pointed convertible collar, and topstitch trim. With or without self tie or purchased ruffle trim. View A - sheer lace yoke. Purchased belts.

Size 12:

Bust 34 inches / 87 cm

Waist 26 1/2 inches / 67 cm

Hip 36 inches / 92 cm

Pattern is UNCUT and factory folded. Envelope has small tears around edges and opening, paper tanning, store stamp on the front.

More '70s patterns here:

https://allthepreciousthings.com/collections/1970s