If it was a berk bowl, it would have 2 1/8 NPT fittings with plugs at about 10:30 an 1:30 to fill it with oil. Generally they have plastic plugs on the ass end too. Yours looks to have a stainless or brass plug behind the bushings. Is that center hole threaded?...if so, that's where the grease fitting goes. Some of the earlier Dominator bowls were water lubed, and the bushings will most likely be shot.
Best thing to do would be to in install a newer dominator style greaseable bushing insert, then sleeve the shaft to get it back to dimension. If you don't have a local shop that can do this work...send me a PM, I'm equipped for it.
