Just got my long-awaited 3rd Gen Gillette Aristocrat (Made in England) FB (Set #21)...and it beat my 4th Gen Diamond Bottom (Set #66)...both in terms of smoothness and efficiency! Total surprise...as I thought nothing could be smoother than the 4th Gen. I will confirm my findings over the next few days with my other top blades (Feather and Polsilver). Wow...just wow! No offense to my fellow Americans , but the British rule the Gillette vintage world!