Miniature painted, signature to identify nineteenth century man

We are not sure that it is a hand-painted miniature, it may be a process, we have a doubt. The work is old, from the nineteenth century. The miniature is in good condition with some friction and small black dots on the miniature, slight micro-scratches on the protective tile. Note scratches on the frame and gilding wear, a missing screw on the back. For the state thank you to detail the photos. A4518. Feel free to zoom in. Photos are an integral part of the description. Size: Frame: Height: 22 cm. Thickness: 2 cm. Width: 18 cm. View: Height: 9 cm. Width: 7 cm.