A very rare Bucherer Deep Diver Valjoux 23. Case diameter 39mm. Except for the crown. All maintenance has been completed. Mica glass. Power reserve up to 2 days. Chrono function is flawless and accurate. Definitely a piece that collectors will want to have in their bag. I've been in the retail industry since 2003. I love wearing and selling watches. I offer the highest quality and cleanest watches. After verifying their authenticity, I perform all necessary maintenance. Everyone's happiness makes me happy.