I spent hours and days as a schoolboy playing tabletop cricket with two hexagonal rollers like that. One had numbers on to represent a score of runs off one ball, but you didn't ever score five, only 1, 2, 3, 4, 'Howzat!' and 6. Howzat meaning an appeal for which you rolled the other roller to find it was caught, lbw, no ball, run out or whatever.

Anyway, it's a game roller for a tabletop sports game but obviosly not cricket, presumably something american, basketbase or something.

Cheers.