Shimano Acera X (M291 GS) exploded view - #1535 April 1995
Shimano Acera (M330 series) exploded view - #1810A October 1999
3x8 Speed Derailleur Switch Shift Lever Mtb Bike Bicycle Parts Left Right Shifter For Shimano Acera Sl-m310 Bicycle Accessories - Bicycle Shifters - AliExpress
Shimano Acera M3000 Series Rd-m3020-8 Rear Derailleur 7/8s For Mtb Mountain Bicycle Original Shimano - Bicycle Derailleur - AliExpress