Doing some research for a serial number for a custom engraved 1016. Interestingly I find pictures and models of 1966 1016's with different dial configurations. Generally these are good sources so I am a little confused. Mainly has to do with where the SWISS T<25 is located. In some instances it is at the bottom of the dial closer to the rehaut and on the low end of the indice ring and in other cases it is on top on the ring. It appears at least on original dials, that the gilt versions have the SWISS high on the ring and non gilt are low. The other thought I had was that one or the other changed with a service dial replacement.
Any thoughts, information....
These are both 1966 from reputable dealers with serial numbers that are from 66.