This is a surviving photograph of a model from the 1950s.  The original negative no longer exists.  The image produced a couple of problems. One very minor. One very major. There was text over the image. Easy to fix. What was not so easy to fix was the "marble" pattern on the image, a common fad at the time. From a restoration point of view, a nightmare to correct and slowed up the whole restoration process. Once the restored image was completed, I colourised the image. The final image being A2 compared to the original A5.