-----

btw -

you inquired earlier regarding the possibility of the A-D having a metric ("French") gear block thread

​​​​​​

in this image a groove can be seen on the hub shell inboard of the gear block threads and outboard of the flange

this is Maillard's marking to indicate that the hub threads are of BSC/ISO dimension

when the groove is absent the threads are of metric dimension

Maillard did not produce hubs with Italian thread


-----