Glass Insulators

[Crusty Shellback]

Any insulator experts out there? I have two glass insulators that are very dark brown glass. The first is embossed ARMSTRONG 3-47:.. with an A inside a circle under that. Under that are two tiny numbers that look like 4 6, the opposite side says 51-C1 MADE IN U.S.A. The second one says ARMSTRONG 14-47:.. with the same A in a circle and 46 under that. The opposite side of this one has the same 51-C1 MADE IN U.S.A. The insides are threaded. They are 3-3/4" tall and 3-1/8" diameter on the bottom. They have mold seams on their sides. I'd love to get some info on their age, rarity and value (If any). Thanks for any help
!

 

[No gold in NY]

I don't pay much attention to insulators, but it is my understanding that anything other than green glass is more collectable. I have a few green and a pair of white ceramic insulators. That is a nice pair you have. I really like them.

 

[port ewen ace]

nia.org .... database

 

[Crusty Shellback]

Thanks for the link, I actually found one on that site but not much info to go with it. All it said was this:
This insulator was made for low power distribution and the amber color was to compete with porcelain insulators.

 

[Crusty Shellback]

These are the first I've seen of this color but I'm not familiar with insulators at all.

 

[sandchip]

Looks like a CD167. Not an especially rare or valuable insulator, but a nice find.

https://allinsulators.com/photos/glass/145-184.htm

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[Crusty Shellback]

Thanks sandchip.