no retro, I am familiar with MJ, I saw this on the news the other day and there was a close up. It's a grid, bit like GO but the pieces are thick coin shaped with some sort of inscription on them possible made from bone/ivory originally probably plastic now.
My original idea was Mah Jong - but it didn't quite gel. Latest news says the poor 39 in the lorry were probably Vietnamese, so that ties in with andres' answer.
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