1920's Simplicity 604 Pajama Pattern Bust 34

Very rare 1920's Simplicity pattern. Unused condition and in original folds.
This is a smaller format envelope measuring 6-1/4" by 3-7/8".
Unprinted pattern pieces. Directions are on the back of the envelope.
Misses Pajama pattern. Sleeveless top with banded neckline. Trousers with band at waist, button at sides.
Size 16; Bust 34. (note: this is a 1920's Size 16 - no bust measurement is listed - Bust Size is based on similar Simplicity Size 16 patterns from that time.)
The envelope is tanned with age but sturdy with no tears.
The pattern pieces are in amazingly well preserved condition.
Undated  1927-1929. "Patent Applied For".

NOTE: I purchased these patterns several years ago from a lady whose grandmother had purchased them in the 1960's when the contents of an old closed down general store was auctioned off. A treasure of a find and all are in amazing condition.