Olivetti used regular M3 thumb nuts.
via Otto Koponen at https://www.reddit.com/r/typewriters/comments/1w4cy0o/spool_nuts_for_olivetti_lettera_32/
Olivetti used regular M3 thumb nuts.
via Otto Koponen at https://www.reddit.com/r/typewriters/comments/1w4cy0o/spool_nuts_for_olivetti_lettera_32/