[CR]cart bb id

morning all found this bit laying in the bottom of a box o parts and have always wondered where it came from ie who mighta made it any clues? ti axle cart bearings adjustable alloy cups both sides only marking N - 2 - 4 see pix http://www.acmebicyclecompany.com/misc.htm there are alloy bolts original to bb who knows..... spindle length 111mm english cups thanks peace sarahgibsonkansascity

"Once social change begins, it cannot be reversed. You cannot uneducate the person who has learned to read. You cannot humiliate the person who feels pride. And you cannot oppress the people who are not afraid anymore." - César Chávez