This is not AIGO Kogyo Co., which branded its tools AIGO. This is Allied International, a California-based tool importer. Here's one of their logos for reference.
What's the total height of the caster assembly and what are the wheel diameter/width measurements?
My cabinet has drill holes spaced 1" apart on center (width) and 2 1/8" apart on center (length). Looks like yours had the same drill holes in the bottom, but another set of holes was drilled for...
@abie - I just picked up the same Craftsman cabinet, but mine is missing the casters completely. Any chance you took measurements of the original casters on yours? I'll be doing a similar restoration to yours, but haven't had any luck finding true original casters, so I'm hoping to get new...