CZ mounted them to several models from the early sixties onwards like this 1964 125cc CZ MX:

Then the sport bikes got even lighter hubs with asymetrical hub to save weight, the symmetrcal sport hubs where then standard to the serial bikes of CZ and the design even copied by MZ, (MZ hubs are quite a bit heavier) .

Thanks,

So they are MX-hubs. They look little like the ones on road models. Symmetrical is good because it it more easy to find rims that fit reasonable well.

It is good to know since the alloy1/2 width Monark-hubs (1955 model) we often use are getting rare and are difficult to find nowadays.

I sometimes see the 1/2 width asymmetrical MX-CZ hubs in advertisments but they are expensive. Too expensive for me🙄. But the gold colour is for me a signal of electron🙂

I was told the MZ-hubs also are pre-65 but as you say they are heavy, I would prefer some lighter alternative.

Thanks again