Encoders from Kit of Parts (Many Years Ago?)

[TogetherSword8]

I was running through inventory of our electronics and sensors, and stumbled across two sensors I cannot identify. The only markings on them are TTL-232 Rev NC and on the back is two different numbers on each encoder, CT0INV0273 and CTD00126491. Other than these numbers, they are completely identical.
I have tried googling these markings, but so far I have yet to find anything similar. I am pretty sure that they are not TTL-232 converters, because the only pins going out are 3 pins, and the two outer pins are labeled 1 and 3. The pin labeled 1 on the other side has BLK, which would have to go to that pin, as there is nothing else.
There is one capacitor, and 3 chips, one labeled U1, another CP1, and the other labeled B.

I don't have a cable to download the picture from my phone (my phone doesn't have internet on it) but as soon as I get it, I am going to add the picture to this post. Hopefully that will clear up any confusion on my description.

Anyone have any ideas of what these are? The only lead I have is our head mentor thinks they might be from 2003-2006 Kit of Parts, but I cant find any lists of what came in them. Thanks for any ideas.