It is actually a nipple dial when you look into it closely. I am not sure if we are going beyond the scope of what is to be discussed in the replica forums as these are topics that are more likely to be discussed in the genuine forums , but I always welcome any information that can educate us in both fields.
When I first saw that image around 1993, I sighed a breathe of relief, but something just did not mesh!
If you look closely, it appears to be assembled from two genuine watches where the dial and hands could have come from a yellow gold 1680/8 and the bezel from a Tudor snowflake In those days parts and spares were available like new tyres for a car. .Even today, you could probably do it where you would be short of a Tudor insert I have seen genuine original pre owned nipple dials advertised on ebay for high premiums but when added to an ordinary stainless steel submariner to create something more unique, you are going to easily double your returns. Yes genuine! But is it exclusive for a particular line, I am not entirely convinced!