DVD+R: Ricoh Gold tops will have a RICOHJPN R01 (4x), RICOHJPN R02 (8x) and RICOHJPN R03 (16x). Ricoh silver top 8x discs are MBIPG101 R04.
DVD-R: For gold tops these will be 8x CMC MAG AE1 and 16x will be CMC MAG AM3. Silver tops are FUJIFILM03 (8x)
I wouldn't use the Ricoh silvers as Francksoy had problems with the MBI R04 discs degrading. Also, the Gold top +R discs are variable as they are made by Ritek in Taiwan and MBI in India. If you get a good batch, they should be good.