WatchTech

A David Walter Double Pendulum Clock – Part 4, Invar Pendulum Parts David Walter's new double pendulum perpetual calendar clock is advancing every day. For those of you who didn't see the earlier installments of this series, you can catch up by looking he...  

Thank you! Looking forward to more! :) Best Blomman

I am reminded as this series progresses about 'manu' and 'factus' in hand-made. Thanks for the pleasant journey. Regards, MTF

Extremely impressive finish David has achieved on his invar parts- beautiful work. I worked as a machinist before getting into watchmaking, and have machined some strange alloys, but never any invar series. May I ask, what specific version of Invar does D... 

so please keep them comming. This is Invar 36, there are many variations of Invar which comes in sheet, rod, and bar, Invar 36 is the most suitable for pendulum use, there is a newer version called Super Invar which recieves more heat treatment, the aim b...