The Kodak Box Brownie is an incredible camera, my copy was made in 1946 and has a 1/40th shutter, an innovative (for its time) close up lens and an aperture of about f11. That’s all the options you get. Beautiful, elegant and simple.
You can’t buy 620 film any more, so you either have to respool 120 rollfilm or file down the 120 spool and trim the spool tips to get the cartridge to fit (which is what we do).