Judging from the bolts shown in the second picture from the top, it looks like the column can be separated from the base. But disassembling the two parts would require disconnecting every electrical and plumbing connection and figuring out how to lift the column off safely, move it in, set it down, move the base, and reassemble everything. Finding someone who knows all about vintage Chevalier mills and asking them for advice would be a good place to start. That might require a separate post asking for a Chevalier expert, an experienced rigger, or both.