Beta clutch release bearing - 10mm spigots (type 1)

There were two types of clutch release bearing used on the Beta (three if you include the optional multi-plate clutch sold for "sporting use")

This one pivots on 10mm spigots.   The bearing acts on a 40mm diameter (ID 36mm OD 43.5mm) Overall height 42mm.   Overall width including spigots 98mm