@coop, thank you so much as usual for sharing your knowledge and expertise and making me understand it better. After ruling out the 3 diagnostic markers caused by polishing die issues on these years, the final diagnostic marker that would really make it differentiate between RDV 0005 and RDV 006 is that, the upper loop of G is curve and shorter. It's really tricky esp from a beginner like me but I'll try to get it right next time. Again, thank you so much.