Rather prevalent in smaller Maine communities through the 1920's were six-pin telephone open-wire crossarms as seen here. Most likely these were popularly used by the New England Telephone and Telegraph Company in their earlier days.

Manufactured to last many lifetimes, heavily creosoted-pine 10-pin crossarms eight to ten feet in length were used by NET&T after the 1930s or so.

Some are still in service here in SE Massachusetts supporting paired telephone cable, fiber and cable TV lines; mostly for extending these circuits away from the pole on account of adjacent big trees, etc.

+++++++++++++++++++++++++++++++++++++++