For those interested the process used to make this image was done many, many years ago, when I had the use of a 500 mm mirror lens.
I had learnt early on that in positive film, the white, when overexposed becomes transparent. SOoo, using a white background with a hole in it to frame my face, made a self portrait using a timer.
Then cutting a white circle that fit in the lens face, took my picture in a mirror, the camera lens face becoming transparent.
next taking both images and sandwiching them resulting in the image seen here.
Remember this was done so many years ago, it was a great deal for an early camera buff.