RideShimano on Twitter: "TBT: 1984 Shimano introduces the Dura-Ace 7400 series. The first SIS shifting system in cycling history #RideShimano https://t.co/GIfp3Gm2Fe" / Twitter
My old cycling clutter: Shimano 7400 Dura Ace - Merlin Cycles Blog
Shimano Dura Ace 7400/7402/7403 Groupset: 7/8 Speed - FC - RD - FD - BR - Bike Recyclery