De ville, Pelagos, Tangente, Tradition, ( and a bunch of Seikos).
I was on the verge of getting 1 spd loss on face up position. But after numerous attempts got close and may have tangled the balance spring. With a generic magnifying glass I am unable to see the extent of tangling. However the time graphing app is reading beat error at 17 ms and seconds are 2000+, the lever for regulation is dead on centre, and no matter how hard I make miniscule movements on the other lever for beat error correction it plays in between 15 to 17+ ms. I doubt until I dismantle the bridge, I may not be able to correct the spring.