Originally Ma Bell and perhaps others used 6-pin crossarms for circuits whereby pole space and economics were the rule; compared to vertically mounting several or more sidepins. The forementioned crossarms date from the 1880s to around 1910... when New England Telephone and Telegraph went to 10-pin arms. Many of the 6-pinners had double lag bolts mounted diagonally to affix them to their poles. Most had crossarm braces too. As more lines were needed commencing during the early teens, 10-pin crossarms were the standard and were mounted below the old-6 pin arms when the pole was sturdy enough to take the added weight.

In ensuning years, these old poles were replaced and 10-pin crossarms were mounted upon the new ones. NET&T always used creosoted arms that were designed to last for a million years. They often had a pole tag mounted halfway between the center bolt and the end of the crossarm so that their wires could be identified. Crossarm braces were mounted from the *outside* of their arms for many years, in respect to AT&T practices.

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