It feeds 120 spool but take up spool must be 620
*)According
to Dan Fromm who is believed to be a Graflex expert, this is incorrect!
These holders would feed perfectly well the 120 spool,
but must take up on a 620 spool.
Unfortunately I can't agree as several 120 spools I tried, did not fit into
the
take up spool mechanism.
2) Threat the 120 paper through the holder and back to the take-up spool.
3) Close the holder, but leave the dark slide open.
5) Now carefully advance the film by turning the advance knob until the adhesive
tape appears. Stop turning the advance knob and close the dark slide.
6) set the frame counter to the black "S" mark.
7) turn the advance knob until the red (1) is opposite the marking line.
8) Ready to shoot your first photo.
Adapt-a Roll camera sided front. Dark slide runs under the tag. Size of frame 5,7 x 7 mm. From Rollfilm spool to take up spool

Photos Jo Lommen
View on the counter mechanism inside and counter advance and counter from outside the 620 roll holder.
Usable
Film Holders for your classic camera
to find out that there are several ways
for many camera types
to use still available film sizes