Antique Reverse Painting on Convex Glass

I'm offering an absolutely beautiful reverse painting on convex glass. I've tried to photograph it as well as I can, but the flash from my camera was a problem. The frame measures 18 1/2" x 23 3/4" and the frame itself is 2 3/4" wide. The original hardware is still on the back.

Their is no paint loss or flaking. The windows and steps have a foil background. The white spot on the upper part of the picture is of the moon. The title of the picture is written on the bottom called "Blue Danube".

I'm always happy to answer questions.