Simplicity 5548 vintage sewing pattern, dated 1973.
Boys' Suit:
The top stitched pants with fly front zipper closing have waistband, side front yoke and pockets and purchased belt slipped thru self fabric carriers. The lined jacket with optional top stitching has underarm sections, front button closing, notched collar, long button trimmed set in sleeves, back vent, patch pockets and optional button trimmed flaps.
Size: 8:
Chest: 27 inches / 69 cm
Waist: 24 inches / 61 cm
Hip: 28 inches / 71 cm
Pattern is uncut and factory folded. Envelope is in good vintage condition.
More boys patterns here:
http://allthepreciousthings.com/collections/baby-and-children
