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

	Piaget G0A43112	Piaget G0A39112
Model	Altiplano Date Automatic 40mm	Altiplano Automatic 38mm
Caliber	Piaget Cal. 1203P -- in-house automatic with date, 28,800bph, 44h PR, 29j; used in Altiplano Date Auto; ultra-thin case-integrated architecture	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	2018–present	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	yes	yes

Piaget Altiplano Date Automatic 40mm vs Piaget Altiplano Automatic 38mm