Vintage Shimano Dura-Ace SL-BS77 Bar End Shifter Set 9 Speed Road TT SIS 7700
Markings and details: Shifters feature Shimano and DURA-ACE logos with SIS index markings; instruction sheet and box are labeled BAR END SHIFT LEVER 9-speed / Bar End Mounting / Precision SIS Action and SL-BS77.