Mutoscopes had a circular drum with photos attached that worked like a giant flip book. The reels were composed of hundreds of photos, each making a 'frame' in the movie when you turn the crank. What I have here is a photo from a Mutoscope reel that shows Babe Ruth training with Artie McGovern on the roof of McGovern's gym in NYC. Gehrig also trained with McGovern. These reel photos are rarely seen. Goldin offered a full machine for sale in 2015:
https://goldinauctions.com/Babe_Ruth...4129225b4741d0
I do not know what to charge for this, so I am going to offer it up here for auction and see what happens. The back is blank.
Starting bid is $20. Shipping included. Auction ends 3/20/22 at 5:00 pm Pacific. Zelle preferred, other means of payments available.