Hello,

perhaps someone can answer these two questions that is in my mind for quiete some time:

First one relates to the 1133B Monaco´s (cal.11 &12) where you recognize two different tones of blue on the dial.

Very often it is a pale dark blue but sometimes you see a rather metallic lighter blue (as in the re-edition ones).

Example for pale blue:

And metallic:

And here (yeah I know, wrong sub-dial hands):

Are both correct and if so can they be tracked down to a certain year the change took place?

The year also concernes my second question:

When did the change from the original Chronomatic caliber 11 to the stronger 12 take place? Any guess?

Greets in advance for your help/ideas

Micha :-)