Zenith El Primero – Cal. 400 (aka 3019) Martin came in several weeks ago and dropped off this Zenith El Primero and a Jaeger Le Coultre Chronomaster. This watch, however, needs a lot of attention. For starters, the crystal is heavily scratched. The case tube was previously worked on by another person who decided to put in a different screwdown case tube. Which is understandable because getting parts from Zenith is next to...
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