Full Disclosure

With complicated inner mechanisms exposed, skeleton watches are the intriguing exhibitionists of timepieces

Totally transparent. This page, from top: Piaget Altiplano Skeleton, $37,650 piaget.com) IWC Portuguese F.A. Jones Squelette, $58,000 iwc.com) Vacheron Constantin Malte Tonneau, $206,000 vacheron-constantin.com

Opposite page: Tag Heuer Monaco V4 concept watch, available in 2009, price not yet determined tagheuer.com

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