Originally Posted by
desconhecido
Normandy hubs are pretty clearly indicated as to thread and the metric freewheel threads on smoothly and perfectly. Metric freewheels are too small in diameter to thread onto BSC or ISO hubs very far. So, it's a metric hub, appears to be original, and all indications are it's a 77.
My '78 Peugeot PR10 has a French thread Normandy hub, but it was a home market bike brought over by a French guy. I've got an English thread Normandy hub, and thought of changing it, because the biggest French freewheel I found is 28t.