It is very possible when this photo was taken that the older 6-pin telegraph pole line seen here (on the right)(Western Union?) was in the process of being upgraded by the 10-pin line viewed (on left). The older (6-pin) lines (c.1890) mostly had iron wire. The newer pole lines WU and others were upgrading to around 1910 into the teens employed 10-pin arms, double-petticoat insulators, cedar poles and hard-drawn copper wire (as seen on the left). This was the rule mostly throughout Western Union country as standard procedure at least here in New England. Some of these poles and lines stood sturdy through the 1980s when (sigh!) removed from most RR rights-of-way in this region.