The most useful collection stories explain the relationship between an object and the person recording it. A short, specific account can be more informative than an unsupported claim of rarity.
Tell us what you know first-hand
Describe how the shirt entered your collection, which details caught your attention and which memories are your own. Separate a personal recollection from a fact you read elsewhere.
Make images traceable
Identify who took the photograph, how you can authorise its use and the credit that should accompany it. A website link alone does not establish permission to republish a picture.
Welcome a correction
Record uncertain dates and missing context honestly. An archive becomes more useful when a later contributor can see what is known, what is inferred and what is still open.