HB-SIA back from service

Picked up my HB-SIA (321.92.44.52.01.001) back from warranty repair on Saturday. The center stop second hand wouldn't engage, but the watch kept good time. I didn't see any obvious signs of damage that would have caused the hand to not engage, but approaching zero expertise. A number of parts were replaced, but I was surprised that the coaxial wheels were replaced. Maybe an update? Zero complaint from me as it is has new life! Now to put it back on the titanium bracelet. I haven't taken it off (except to shower and for this picture) since Saturday. It just feels great on the wrist.

Not surprised about the co-axial wheel. However two balance complete being replaced is pretty unusual considering the watch only has one balance!

Hah! Whatever is in those two blue boxes! I have a theory why there were two included with the parts. one has a small note written on the case that says "defective", so maybe it was the first one use to replace the original, out of box failure, so they used another. why they included it, no idea...but it seems like a plausible theory given it is marked as defective.