Receiver insert identification

[sebbel]

I found about 36 receiver inserts. I have 9 different models.  I'm familiar with the Western/Northern design but not with any of the others.  Any  help is appreciated. If anyting its interesting to have the side by side.

<edit> Number 1 through 9 Left to Right.     Terry

[JorgeAmely]

I am not too familiar with these, but in a lot of telephone equipment, if available, patent numbers can give you you a clue as to who filed the patent and the company that paid for the initial patent filing.

Visit Google Patents and enter the numbers there. Design patents (those beginning with D, followed by a string of digits) can be found at this site too.

[rdelius]

Black one far left is WE
2nd from left old WE
3rd from left Kellogg
4th from left poss Auto elec or Am elec magnet type
5th Dean??
others might be Chicago
9th SC