The porcelain insulators are a lot similar to those that I have found that Boston Edison once used. They are double-inner skirt, of tan glazes and have concentric lines around their outside and inside from the spinning process during manufacturer. Perhaps they are Trenton Porcelain pieces?

I have no idea what the rounded-top, bell-shaped glass(?) ones are on the crossarm right beneath. One would think they were Provo No.2s at a glance but what we see are way too small. Perhaps some design that we collectors haven't discovered yet?