In order for me to properly assess what you have I will need to know the size and see images of the front, back (do not remove from frame) and a clear, in-focus close-up of the signature.
If you had already attached images to your initial posting, they are not showing for me here on my end.
Please send the photos at your convenience. There is not an extra charge to provide more pictures here.
I would really need to see what you have in order to help assess it for you.
I can wait as long as you need for photos.
I hesitate to recommend outlaying costs for conservation on a chromolithograph print though - as usually the cost to conserve far exceeds the value.
Yes, please send images when you can. No rush. There is not a time limit here.
You are welcome.