This is a page dedicated to images taken on 127 size film but exposed as 4×4 negatives.
Two cameras have been used for this, a Bencini Comet with a fixed exposure of 1/50sec at f/11 and a Rolleiflex 4×4 which has full exposure control and therefore can work with fast and slow film.
Bencini 4×4 images
Rolleiflex 4×4 images