S Scale wheel set identification.

In preparing to move, I found this box of S Scale wheels, I believe they are from the first run of U33s or SD70s.  Can you three scale guys tell me what you think they are for? I no longer have any of the locomotives they would have gone with to compare to.  I don’t know if the wheel sets for both locomotives were the same or not.  

Just looking to be able to identify what model these would be for.  

Ben

6E88EC82-B9B8-42C7-8354-4AF16BAE119A 

NASG&CASG

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They're from the U33C.  SD70's/ES44's wheels don't have the center worm gear. 

The catch is, first production U33C's had a different gear ratio than the second production U33C's.  About the only way would be to count the teeth on the main gear, but you need a known gear to compare against.

Rusty

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