[Platapus]

As long as you recognize the difference between rare and valuable.

Of the hundreds of photographs that were probably taken of the Arizona, this may be one of the less common ones.

I doubt that it has a financial value due to the condition and the composition of photograph itself, so don't keep it with a fantasy of it being an investment that will pay off in the future.

Is that any indication of who was the photographer? If it was someone famous, that may garner some small financial value.

One option is to get it professionally mounted and lend it to one of the Arizona memorial societies. That way people who are interested in it can see it and you still have ownership. I have done that with a few small museums/societies and they have always been appreciative.