The current case of Zenith's El Primero collection (top, 42mm) is clearly inspired by the original 1969 Ref. 386 model (bottom): (more here! ) Now, I was shown a subtle further development of the case (on a watch - marvellous - which has to remain hidden ...
Is there an extra module added to the mechanism that requires more head space? But the case diameter is the same because they used the same base movement.... What would they need more case volume for? Regards, MTF
The side shot gives the impression it is a significant change in the lug curvature. I'm hoping it gives the case a more contoured fit for those of us with smaller wrists. Now I'm waiting anxiously for the reveal and to see it it will impact multiple model...