Side-by-side at a glance. Click a watch above to open the full reference page.

	Piaget G0A42105	Piaget G0A39112
Model	Altiplano 60th Anniversary Hand-Wind 40mm	Altiplano Automatic 38mm
Caliber	Piaget Cal. 430P -- in-house manual-wind, 18,000bph, 43h PR, 18j; used in Altiplano 60th; only 3.65mm thick; launched to celebrate 60 years of ultra-thin expertise in 2017	Piaget Cal. 1200P -- in-house automatic, 28,800bph, 44h PR, 27j; only 2.35mm thick -- world record for thinnest self-winding caliber for years; ultra-flat Altiplano benchmark
Case size	40mm	38mm
Lug-to-lug	46mm	44mm
Years produced	2017–2022	2010–present
Brand tier	luxury	luxury
Era	modern	modern
Movement tier	Unclassified movement	Unclassified movement
Market median (excellent / full-set)	n/a	n/a
Typical range	n/a	n/a
Confidence	low	low
Categories	dress	dress
Editorial	n/a	yes

Piaget Altiplano 60th Anniversary Hand-Wind 40mm vs Piaget Altiplano Automatic 38mm