It’s not quite as tiny as the Willard Wigan micro-sculptures in Greubel Forsey’s Art Piece 1 watches but, at less than 3mm in height, the gold bust of Marcus Aurelius in Christophe Claret’s Aventicum is pretty petite too. Based on an original gold bust of the Roman emperor that was found in 1939, the little sculpture looks twice as large as it is, and appears to float at the centre of the dial – thanks to a mirascope comprising two identical parabolic mirrors. The ancient Roman theme continues on the flip side: The transparent sapphire rotor features five Roman Gaul racing chariots that swing around with each wrist movement. Available in red gold and PVD-treated titanium, or white gold and PVD-treated titanium. Christophe Claret retails exclusively at Sincere Fine Watches in Singapore.