I have these on my 1947 1.5 ton: Note 1947 Advance design- but this may help, or may be the same:
http://www.trademe.co.nz/motors/car-parts-accessories/chevrolet/steering/auction-860418638.htm
I bought bearings from this seller a few years back, cannot remember if it was these same types. I recall a different description that didnt match my truck, having to check the sizes and they were correct.
The ad states 909046, I will ask for sizes.

The bearings from my 1947 AD inner front:
Outer (hub) diameter 3.15", New Departure 909626
Inner (Spindle) diamter 1.5" New departure 909526
balls and cage new departure 909526




'47 Canadian RHD 1.5 ton truck