>>41462211
Good thread OP, nice to see some research into something that, for me at least, is new. In this image the straps on the arms with the X stitching form IX(9) XI(11). One arm uncovered and one not could reference Boaz and Jachin, perhaps a Rebis reference?
The circled star triangle lines circled maybe an elliptic reference as well as unification of opposites? The webbing/belt looks like a Masonic sash.
There's an arch behind but lack of a keystone argues against it being a Royal Arch reference. Sometimes an arch is just an arch!