https://www.hodinkee.com/articles/the-zenith-pilot-type-20-extra-special-silver
Introducing: The Zenith Pilot Type 20 Extra Special Silver - Hodinkee
This is Zenith's first silver-cased watch.
zenith pilot type 20extra specialintroducingsilverhodinkee
https://www.sothebys.com/en/buy/auction/2024/important-watches-ii/heritage-pilot-type-20-reference-87-2430-4035-21
Zenith | Heritage Pilot Type 20, Reference 87.2430.4035/21.C721 | A
type 20