stringfellow1946
Senior Retro Guru
The 7402 was identical to the 7401 apart from the return spring. The Ultergra 6400 series of brake levers and the 1055/1056 didn't use stepped ferrules either, & they are all from the same time the late 80's, Your correct with the 600AX though, they like the Dura-Ace AX did use stepped ferrules.