Furthermore, to find one in this condition? Not so easy. While Chronomasters are fairly common, it is much harder to find the higher quality Croton variant. With its deep black bezel in an almost unused condition, the unpolished stainless steel case along with a perfect dial, this is what the term ‘collectors grade’ means. This example is particular is in particular collectable as it is in exceptional condition. While the others used lower grade movements, the American bound watches were powered by the industry-leading column wheel Valjoux 23. Some were branded under the Nivada Grenchen name which was powered by the Valjoux 92, but the Chronomasters that went to the US were branded Croton and this variant is by far the highest quality. The Chronomaster came in several variants. Several years later, the watch found its way onto the wrist of Admiral. In 1950, Nivada brought its first water-resistant model to market: the Antarctic. Nivada watches were marketed in the US by the companys distribution partner Croton, with the Croton name appearing on the dial. This is exactly what the current market loves and it is no wonder the Chronomaster is a perennial favourite. Croton Chronomaster CASD - 105/9870 - 60s - Serviced. Diamonds which are the hardest substance on earth rate a 10. Sapphire is used to describe the blue variety corundum, while ruby is used for the red variety.) A Sapphire crystal is a lab grown crystal that has the same properties as a Sapphire which rate a 9 on the Mohs scale of hardness.
It has a large 38mm stainless steel case with bevelled lugs, an aluminium minute/hour bi-directional bezel and of course, large broad arrow hands. The correct name for the material is corundum. With this example, it is all about the aesthetics- a first execution model that features a classically 60s sports chronograph styling. The Chronomaster came about during a time where adventures and exploration was a hot topic and many watch manufacturers took advantage of this, releasing multiple sports watches. Quite the mouthful, but talk about tapping into as many demographics as you can! This is perhaps one of the most epic watch model names to have come out of the 20th century- the Croton Chronomaster Aviator Sea Diver.
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