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1950's Zenith Chronometre Cal. 135 in all Stainless Steel Case. Mint Original Condition – Corr Vintage Watches
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Zenith Calibre 135 Observatoire Limited Edition: The Reincarnation of Calibre 135-O | Swisswatches Magazine
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Zenith, Kari Voutilainen and Phillips Join Forces to Revive a Historical Chronometer Movement (With Live Photos) | WatchTime - USA's No.1 Watch Magazine
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