Antique Self Portrait Photos of Man & Woman - How old?

[maxiebaby0914]

I bought this at an indoor flea market today. It was on the $1 table.
It's 3.5" length and 2.75" width, in its frame. The self portraits are in color. I didn't take them out to inspect it as I do not want to damage anything.
I was wondering by looking at their hairstyles and clothes, how old the pictures could be?
Are these kind of self portraits in color collectible? Any info would be greatly appreciated. 🙂
Sorry in advance the photo loaded upside down. I don't know why.

 

[JimDon]

Actually I only think the value would be to the family. Does peer to be turn-of-the-century though 1900