Audemars Piguet Mini Quantieme Perpetual Calendar ref. 25679BA

An Audemars Piguet ref. 25679BA ‘Mini QP’. This rare little reference packs quite the punch. AP managed to fit their Quantime Perpetual Calendar movement into a 30mm case. Quite an oddity that sums up the 90s for AP; a period that saw real innovation from the brand.