truckernix, Thank you,

at least now I have some casting numbers that I can look for, and a general idea on possible years.
stonecutter, nope, looks like '39 thru '57 were the years for the drum, and '41 thru '55 (1st.) were the years for the hub.
Way too cold outside now, -5 tonight

and maybe teens for highs this weekend. I think I will investigate casting numbers after the temps warm up to at least low 30s and sunny.
Thanks
John