Men, COL. PARK 36 V 1931?

[Garabaldi]

I believe this is a locker tag. I found this in Boston. Any ideas what park of gym this tag would have been associated with?
Thanks
Garabaldi

 

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[Retired Sarge]

If found in Boston, maybe COL PARK is College Park.

 

[DCMatt]

If found in Boston, maybe COL PARK is College Park.

Or Colonial Park...

DCMatt

 

[Mich. Wolverine]

It looks like a dog license to me. It gives you the place and year. the M might be for male and the V for vaccinated. Very cool find what ever it turns out to be.
Wolverine.