I looked at this in my 2024 report - We should have two grain patterns overlain on each other - one from the original film and one from the B/W copy but it would be very hard identify this in a resulting print.
The Lindsay print has a fairly course grain present across the entire image however it's not possible to know if this is from the original film or from the copy film.
The film grain across the whole print is not in sharp focus - this blur could have been introduced in four ways:
- the print machine making the original print (at a Chemist or photo lab) was slightly out of focus (highly unlikely as this would have auto focus and the prints would be checked before being supplied)
- the camera making the copy print was slightly out of focus (most likely - fairly easy to do on a copy stand when quickly making a copy)
- the camera making the copy print was moved during copying (possible however unlikely as the grain blur isn't movement blur - its focus blur)
- the enlarger making the copy print was out of focus (unlikely as this was a mini-printer which again would have had auto focus)).