Could use advice
Thanks Ej1 for that link. It had a picture of the sub and from the dimensions and weights of the various models in that line, it appears to be ProSub 100. Other data about the speaker features matches mine. The spec shows it has a 10 inch speaker. I remeasured the speaker cone and got 9" visible. The other inch could be the overall measure extending beyond the baffle cut out, or it could be that speaker manufacturers are like the lumber industry where a 2x4 is really 1.5x 3.5. The Pro 8 box is definitely smaller than mine.
Also found some info about the BP10s and am satisfied with the deal I got. They all look like new and sound great. $250.