Perpetual Calendar Retrograde Date, 270th Anniversary 'Openface', Platinum Kind of Blue bringing the tachymeter track outside

bringing the tachymeter track outside the dial to its steel bezel

General consensus holds that around 100 examples of these were made

‘For the man whose interests go beyond the horizon

While written decades ago

here paired with Lange’s proprietary Honeygold case material that is reserved for the most exclusive offerings

Perpetual Calendar Retrograde Date, 270th Anniversary 'Openface', Platinum Kind of Blue bringing the tachymeter track outsideA Perpetual Calendar Retrograde Date, made for Vacheron Constantin's 270th Anniversary in 370 examples. The models made for this anniversary introduced an 'Openface' concept, with partially opened dial apertures allowing mechanics to be observed in small sections. The dial is comprised of 18k gold featuring a hand guilloch Maltese cross motif, mixed with opened sapphire discs. This perpetual calendar blends Vacheron Constantin's storied history of