Help with photo dating...

[pancho]

I believe this to be William Samuel Blair, the nephew of defender of the Alamo, John Blair. It would help to verify identity if we could put some sort of a date on this gentleman based perhaps on the quality of the photo or on the period and style of his clothing. Any help would be greatly appreciated. Thank you.

Bob Blair

Attachments:

[Richard Weddle]

This is a tintype, correct?
With some hand-tinted color?
What are the exact dimensions?
Did it come out of an album or some kind of holder?
Where was it located and in whose possession?

Date of birth and death of the subject?

Richard