Thought I'd mention that I spotted the finger of a microfilmer on a newspaper page, as I was slightly amused to see one on Trove.

I'm actually surprised that I haven't seen more - which is a testament to the care taken by the microfilmers to keep their fingers out of the way when they've been doing their work (compared, for instance, to Archive.org - where I've spotted quite a few).

(Not sure if "microfilmer" is a proper word to describe those who operate the microfilming equipment - if not, maybe it is now.)

The offending digit appears at the bottom left of the page in The Wellington Times (NSW), 12 July 1917, p. 12, http://nla.gov.au/nla.news-article137412398