I would like to develop some old Kodak 620 film I found in my Dad's Kodak Junior Six-20 Series II. It has green wrapping paper but no indication of film type. I was going to develop it using HC110 Dev at 1:31 Any suggestions on amount of development time?
I'd agree with Peltigera. Whatever people may say about stand development it is probably the best method with old film of a date and pedigree unknown. Even with stand development do not expect too much. I'd treat any frames with any image as a bonus.
Good luck! My mum have me her dad's six-20 which had a roll of exposed film inside. Been in there since the late 30's. I could barely make out any images.