Thanks for the photo Sonny. It's interesting to see how much separation there is in the 'C' and the 'BU'. Does anyone have any idea why the separation? stamped separately? or ?? if so, maybe the 'C' is carrying some other piece of information we aren't aware of?
and seeing the separation, perhaps Kurt was correct, and there 'was' a 'C' before my BU code, but if so, it was apparetly hit by a highway rock, or debris, and became obscured to the point it is no longer clear.