I don't have any information on that fan, it was likely one of the older ones that was refurbished; but I still have to cut-n-paste my old standby answer anyway, thank you for asking...

We specialize in historic preservation. Every project is unique, and always has unusual features that require custom craftsmen to reproduce and rehabilitate original materials. We cannot answer questions like this because our work is so removed from mainstream interior design and new construction. However, we are grateful you appreciate our work; we post these projects to inspire, and thank you for that.