I do love the old-fashioned chronos from the early '60s and '70s, and I couldn't resist this nice, minty specimen. The Dugena trademark is registered in Darmstadt in Germany, but the movement is a Valjoux 7733. Looking forward to getting this one - more pictures when it arrives...
+1 8200 for the mainspring ( a fine film smeared along the length) plus the breaking grease (can't remember the product code - dark greenish colour) for the barrel wall of automatics.
Just got the dial back from David Bill and it looks great. It now has a blue tach. instead of an orange but they explained this beforehand and I agreed. Not identical to original but looks fantastic all the same. They did a Festina for me at the same time: