Shimano Dura Ace shift/brake lever combination ST-7400 Shifting Brake Levers STI 2 x 8 Speed Vintage | Studio Brisant
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
Shimano Dura Ace 7400 Series Groupset with Wheels - The Paceline Forum
My old cycling clutter: Shimano 7400 Dura Ace - Merlin Cycles Blog