Simplicity 5946 vintage sewing pattern, dated 1973.
The pajama top with front button closing, has long set-in sleeves, patch pockets, buttons and buttonholes or decorative snap fasteners and top-stitching trim. V. 1 & 2 have long sleeves. V. 2 & 3 have "V" shaped neckline. . 3 has short set-in sleeves. The long pants V. 1 & 2 and short pants V. 3 with front fly opening have casing and drawstring.
Chest 38 - 40 inches / 97 - 102 cm
Pattern is partly cut and checked complete. Envelope is in good vintage condition, with a store stamp on the front.
More men's patterns here: