It will be a USN watch cap from around the 1930s.
The top is a knob style, and the name tag is an old type individual with an embroidered tag.
The size balance and condition are good, so if you are looking for it, please consider it.

Condition:

Mint condition with almost no feeling of use.

FABLIC:

WOOL
Made in USA

MERSURMENTS:

FLEE
(Even people with a size of about 60 cm can wear it.)