On Chronopassion’s Facebook page today they posted a picture of a nicely patinaed Officine Panerai Bronzo PAM0038. The Bronzo was introduced at SIHH in 2011, and this particular piece has up to two years to darken and corrode. Each subsequent year, the 47 mm bronze case, which is made of an alloy of copper and pure tin (CuSn8), will get greener and darker.

For reference, here is what it looks like new.