I can tell you more about which Eterna’s which look interesting for me.
I will research divers, dressers, pilots, complications, movements, sources, prices etc.
In a hurry i did ones look at Eterna’s, when i was looking at an Arnolds & Sons Nebula.
The seller of the Arnolds & Sons had much of Eterna’s, so that’s why i see the watches.
Still an interesting watch, rare too.