16800 Dial Question

[Limey-]

I can see the corrosion on the hands clearly. What causes the bubbles in the dial face ??. looks like tiny moisture drops but its actually tiny spherical shiny appearence blisters. There are a couple in the 'white' but they are harder to see. They go down into the date window shaft. Are they related to the Corrosion on the hands??. Its going in for Service this week. Dial color is a nice matt black when not photgraphed its impossible to see the spheres with the naked eye. Same watch in second picture as it appears to the naked eye.