While the “original” Calatrava was reference 96, launched in the early 1930s, reference 530 (and 570) followed soon after and has risen in the hearts of the collectors to the point of being considered nearly archetypal in its design. Featuring the unmistakable vintage Calatrava architecture distinguished by sinuous and simple Bauhaus-inspired case lines, it is in fact nearly identical to reference 96, albeit featuring much more generous case proportions - oversize for the time - and a concave bezel inherited from reference 130. In fact, reference 530 was available also with chronograph, which explains the design connection with ref. 130.

Unarguably accepted as one of the most elegant, masculine and formally perfect case designs of the past century, in this instance the Calatrava case features a steel and yellow gold construction. Beyond being much more rare than the yellow gold counterpart, the mixed metal design adds flair and playfulness to the ensemble.