I have been impressed with those quartz movements
. It has been almost 2 years since I installed that piece and the battery is still keeping the movement going with no time loss.
Dan Mauch
Dan
Here is a picture of my 30.5" 774Mm clock. It was made using my big laser cutter . The movement is a battery powered quarts. What can't be seeing clearly are the brass machined bullets for the hour marker. Next on my list to build is Art's scimitar.
Dan Mauch