Back bracket identification

[phonodesbois]

I have this bracket sitting in a drawer since a long time and still don’t know on which machine it was mounted (Columbia I presume given the shape and elbow).

It looks a bit smaller than the ones for BO and BI.
Could you help? Thanks a lot

[jamiegramo]

Yes definitely Columbia. Someone in the US may help with the model as Columbia machines are more common there.