At the top of the pile, though, is A Lange & Söhne ... I'm specifically wearing the Perpetual Calendar model, which features a pink gold case and a whopping 621 parts within the movement.

Watchmakers are apt to celebrate anniversaries – they are timekeepers, after all – but few of them are freighted with as much meaning as the 30th birthday of the Lange 1, the not-so-simple four-hand ...