Simplicity 8263 vintage sewing pattern, dated 1977. 

Misses' Jiffy® Knit-Skirt, Top, Dress in Two Lengths and Scarf:

The top and long or regular length dress with back zipper have long raglan sleeves with elastic casing, optional self tie belt and can be worn with scarf. The skirt has elastic waistline casing.

***Sized for stretch knits only 

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 is in good vintage condition, with light shelf wear.

More '70s patterns here:

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