OK - I have a very good picture of "open G" levers on the Olmo. Please email if you'd like me to send it to you.
Looking from the side, the lever is indeed thinner than the closed version on the 1962 Atala, the cable slot is narrower, and the lettering area on both (1961 Olmo and 1962 Atala) is closer to the cable hole than on later levers
Does that mean I still need "open O" and "open P" to complete my collection? ;>)
Aldo Ross Monroe, Ohio sunny and warming nicely for a ride on the ugly silver Legnano "Roma"