As Jim already pointed out, a Calatrava is, strictly speaking, a range of watches by Patek, beginning with the
ref 3919 in 1932. They have the Cross of Caltrava on the crown, hence the name.
Outside of that the term seems to be applied quite loosely, but mostly to other makes' three-handed round watches from the 1940s, often ones with a plain and open-looking dial (and with a side of 'I am going to ask a lot of money for this watch').
Does anyone know when people starting referring to non-Patek watches as 'Calatravas'?
And is there really a Bauhaus connection to the original Calatrava, as is often claimed without (AFAIK) any evidence?
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