The Sekonda movement is pretty much an exact copy of the AS1930, used in various Swiss alarm watches, such as the Oris.
And here is the culprit – a badly deformed hairspring. I try to get hold of a new one, but that’s not that easy. After thinking about it and getting my courage up for a couple of days, I bite the bullet and start reshaping the hairspring.
The damaged hairspring. The damage is only on the outermost winding, so it shouldn’t be too hard to fix that. This is a microscope shot, and the background is a piece of pithwood.
To be able to get a better hold, I stick the balance on some rodico and start reshaping, using two very fine angled tweezers.
I try the reshaped hairspring, but the movement blocks every so often. Nothing for it, it wants taking apart. To reduce cost for my client, I only take apart the top plate and parts of the bottom plate.
After having cleaned everything, I start reassembly.
Top plate back together.
The bottom plate back together, with the alarm tested.
With a new crystal, this is a fiendishly good looking alarm watch.
What can I do – I bought myself one on eBay as well 😉