Not seen that slotted bb before.
Pretty common on Seventies bikes (especially UK TT), when everyone was a weight-weenie.
Not sure about a French threaded shell, on an Italian frame though...
The French threads were certainly another questionable feature...
Ah silly me for some reason I thought it was slotted in a different way, hard to explain over teh interwebs but yes certainly seen that before!
@MCamb started
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Pretty common on Seventies bikes (especially UK TT), when everyone was a weight-weenie.
Not sure about a French threaded shell, on an Italian frame though...