Commercial launder tags, name on inside of front. Tags are faded and content and country of origin illegible - but, well known brand that is crisp and well made. Well cared for.
NOTE: Compare the measurements, (made while garment is flat), with an item that fits you:
Chest armpit to armpit 25" CM
Shoulder 22" CM
Middle of back from neckline to hem 35" CM
sleeve 26" CM