For what its worth.
In 1971 I was going through my aunts pictures in attic suite case.
And I found 4 pictures of her beside old Ford overlooking Crater Lake.
In the background was one small dot to right side in all pictures.
Did not seem to be due to camera or dust on negative.
My aunt moved in 1979, and threw the wooden suitcase away.
I wanted to look at pictures in the 1980s again and compare the dots and see if same position on all prints.
This took place In Vancouver, BC.