Shimano DEORE LX Dual Control Shift-Brake Levers for V-Brake ST-M580. Let's you shift gears up or down regardless of your hand position on the handlebar.
Shimano LX FC-M580 crankset 44/32/22 teeth 175 mm Hollowtec with bb BSA 2004 NOS | eBay
Shimano Deore LX SL-M580 LEFT ONLY Triple Shifter Pod | eBay
What happened to Deore LX, and how good was that? - Love for bikes
Shimano Deore LX HB-M580 Front Hub: 36H - Grey (New) - Bike Recyclery
Deore LX ST-M580 Dual control Shifters Shifter integrated Shift/Brake Lever 3*9 27 speeds for MTB bicycle bike part - AliExpress Sports & Entertainment