There is debate about the crystal some collectors think they should all originally be faceted and the rounded crystal is a service crystal but no one really knows
Here is my yellow gold model 


Then I found this platinum model with a difference , yes diamond indices but no sub seconds . Apparently made in a very small batch for either an Italian or English collectors - the story is not clear



Finally two years ago I found one in pink gold 




I will try to find some pics on the wrist but for a small wrist like mine it sits well