SPencer and FAirbanks
That's my first sighting of a SPencer eXchange, from Westchester. I've seen FAirbanks a number of times.

FAirbanks4-5000. Seen in Woodside.

FAirbanks 4-5000. Gun Hill Fence Company. 68th Road between Woodhaven Blvd. and Yellowstone Blvd. in Queens.

SPring Valley and FAirbanks
2-for-1 on this one, though the appearance of the corresponding area codes appears to indicate that this is a retro-chic use of the old exchange names, however old the sign might look at first blush. The Pioneer Fence Company appears to have become the Alpine Fence Company. You can not see it very well but the top number is a SPring Valley Exchange number, and the bottom number is another FAirbanks exchange as seen earlier in my Gunn Hill Fence Company sign sighting.

FAirbanks 4-5000. Gun Hill Fence Company.

FAirbanks 4-5000. Gun Hill Fence Company.