Identifying wheel hubs

[HILL]

I went to look at a JD model A with a friend and it was a 1937 unstiled one. This tractor had solid cast iron disk wheels on the back and the hub has 6 big cap screw bolts holding the hub on. I have never seen any hubs like them before and I can not find any in the manuals I have. I will try to send a picture along, I have never posted a picture before. Thanks

 

[Carlyle hoffman]

Early cast hub, more commonly described as the DRAWN in hub type, the next hub has the 3 bolt CLAMP style collar

 

[Mark-Ia]

Same hub the round spoke wheels and steel wheels
used.

 

[coonie minnie]

I think this is the only hub style for the 10 spline axles. If memory serves, the axles went to 12 or 14 spline sometime in 37??

THese wheels aren't tremendously rare, but they are not common either. Round spokes seem to be a lot more in demand than these.