Vintage Deadstock 1930s wool Burgundy Rib Knit Sweater. Crew Neck with 6 Buttons- women xs/s. See measurements. Still has old store tags attached. Morgan Knitting Mills. It might be a girls as it IS very small- I was able to pull it over my size 6 mannequin for size context. 

Made of 100% Wool-
Measurements when laid flat:
Pit to pit: 14"-17" max-
Shoulder: 14"-15" max-
Sleeve: 15" liong.- note- armhole is 12" around MAX.
Length: 18"
Waist: 8"( it stretches to 14" across max.
It does have a quite a few moth holes. As shown.