Vtg Antique 1930s Silhouette Convex Curved Glass Victorian Themed Framed Picture. These were popular from the turn of the century into the 1940s. This one is a nice original from the mid 1930s. The glass is convex bubble and the frame is metal. The condition is good but does show a little age on the back cardboard backing and the metal frame but is still a nice vintage retro art item.