I've just bought a Tokai Love Rock LS100 from 81. But it doesn't have a serial number. The body and the top are mahagony, it's dark red and it has DiMarzio PUs. Because of the missing serial number I doubt, if everything is ok. But the seller told me, he had already had other Japanese Love Rocks without a serial. The company had missed now and then to stamp them. Does anyone know if this is correct?