What type of weatherproof back was used with Standard Electric Time bell mounted outdoors?

Hello, does anyone know what kind of back box would be used for a Standard Electric Time bell with gong guard mounted outside, please ?

I know the Standard Electric Time bell base is larger than 4" square, so a typical WB backbox probably wouldn’t work well.

I know Standard Time outdoor bells could be placed in a in wall box with grille outdoors, but what if one was mounted outdoors with a gong guard…

What specific type of weatherproof backbox would be used, and would a flange over the gong top be needed?

Ed Burnett

I wonder if Standard Electric had their own boxes specifically for these bells.

I know Edwards has done that before, with the Adaptahorn series, specifically the flush mount ones. Those usually came with a custom box that only fit the flush mount horns.