ETA Calibre 2789 – Part No.242 Cannon Pinion with Driving Wheel Related posts: ETA Calibre 2764 – Part No.242 Cannon Pinion with Driving Wheel ETA Calibre 2770 – Part No.242 Cannon Pinion with Driving Wheel ETA Calibre 2789.1 – Part No.242 Cannon Pinion with Driving Wheel