Simplicity 7594 vintage sewing pattern, dated 1976.

Girls Jumpsuit in Two Lengths:

Top stitched long or short jumpsuit with front zipper has collar, pockets, set-in sleeves and optional purchased appliques. Ribbon trimmed. V1 & 2 have buttoned belt. V3 has roll up sleeve with buttoned tabs and belt with "D" rings. 

Size    10:

Breast 28 1/2 inches / 72 cm

Waist  24 1/2 inches / 62 cm

Hip     30 inches / 76 cm

Pattern is cut and checked complete. Envelope has shelf wear, partial side splits, handwritten date on the front.

More children's patterns here:

http://allthepreciousthings.com/collections/baby-and-children