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There's certainly nothing like this in the current Rolex lineup.

Executed in the traditional 37mm case size and powered by the Valjoux-based cal. 722-1, what we have here is one of only (less than) 10 examples in the whole world: a Daytona from 1967 with a blue pulsometer scale on the chapter ring.

Last time, "The Doctor" was put up for auction, it was sold for CHF 761,000. It is now listed as lot no. 353 in the Sotheby's International Connoiseur Jewels & Watches auction with an estimate of $500,000-$1,000,000 USD.

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