While looking thru my pile of old french bike magazines I discovered that Gosta "Faglum" Pettersson, riding for Feretti, used a Masi when he won the 1971 Giro di Italia. Labeled as a swedish Monark. It has the same BB cut out as the right BB at http://www.richardsachs.com/articles/rsachsperiod.html http://www.richardsachs.com/articles/rsachsperiod.html
When talking to him he just says he sold it to someone here in Sweden circa 1978-9. .............. Somewhere out there in some ones garage sits a Giro winning Masi! The search is on, very on.
My size and would go perfect with my old Feretti-cap.
Regards Johan Ericson Stockholm, Sweden