Its 1750, in Europe, with the large plastic ring on the hub. First series 105, in Europe, had the small plastic ring. Junior did only have a pressed hub without the plastic ring.
From the 2000 was introduced, 1970, in Europe, we got the Sombrero hubs.
The one in post 114, isn't it a Junior, it has only one front light, and it seems as it is missing the plastic, ring on the hubs. All based on European spec.