Today it seems bigger is better, but it has not always been this way. In the 1930’s smaller was seen as more of a technical achievement as people where used to large pocket watches. This Eterna is 31.3mm but has quality to it without being flashy. It tells me the time and then disappears under the shirt sleeve. It also has one of my favourite movements the Eterna calibre 520. This one is not running and has a worn upper barrel arbor hole.
The upper barrel arbour hole is quite worn, it’s not visible in the photo, but you can see the mark on the barrel where it has been scraping gainst the bridge.
Early 40’s style shock protection.
The movement coming apart.
I have cleaned the movement.
The balance staff was bent, so I fit a new one.
I see the new balance staff moves freely.
New mainspring in the barrel.
New barrel bush in place.
Movement coming together.
Setting/ winding mechanism back in place.
Movement back together and ticking.
Now a major problem being the balance is too light and the watch is gaining a lot of time.
I add balance washers to the balance screws, this adds weight and slows the balance down, when I’m close to the correct timekeeping I poise the balance. This operation takes some time, but its good to practice.