I would think someone working within their sales team could answer that more accurately than any of us could. We all would just be speculating.
That said, I certainly can't imagine their operation was in the scale of a Florsheim or Bostonian. The quality would have been horrendous. They would have next to little or no control over anything. Keeping the operation in-house and manageable yields a far superior product. I mean they were a Bespoke operation at some point.
I might query Edward Green and ask them about that.
Edward Green also used to be handwelted exclusively too, yes?