Eterna.Matic Centenaire 61
Case ref: 306 IVT 14 ktr. solid gold capped
Calibre: 1438 U
Start of production 1956
Non-brand strap signed plated buckle.
Size 35,5 mm. including signed crown x 41 mm. lug to lug.
As Eterna was a co-founder of ETA movements they did use
their own calibres inferred of ETA.
For example calibre 1438 U was based on a ETA calibre 2433 later 2438
but made to Eterna,s own specification.