Lego Technic - Balance Clock With Auto Remontoire - YouTube
Lego Technic Clock with Building Instructions - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
PDF Instructions LEGO MOC Grandfather Clock - No toy, no Bricks, No Paper | eBay
Clock for Lego Boost 17101 instruction with programs (Build Boost Robots — a series of instructions for assembling robots with Boost 17101) - Kindle edition by Evdokein, Vladimir, Gergert, Vyacheslav. Children Kindle eBooks @ Amazon.com.
LEGO Pendulum clock: can a LEGO clock run for a whole year? - YouTube