restoration from antique painted photograph. I have seen this technique before. large format: approximately 13x18. seems to be from early 2oth century. looks partly airbrushed. I know airbrush was invented in the early 20th century.
and partly painted with a brush. some brush strokes clearly visible. I scanned the original on large format flatbed. Restoration in Photoshop. Printed client a new copy with inkjet printer a full size.