Super Clone Patek Philippe Aquanaut 5261A Moonphase Black 40mm

The QC video will show the moonphase window under magnification and confirm it advances daily as the movement runs. You can verify the window position matches photographs in the listing. Long-term accuracy requires several months to observe.

Black dials have reduced contrast with hour markers and hands at night, making them slightly harder to read in darkness. The anti-reflective crystal improves readability in bright light. Lume on hands and markers helps in low light.

The window size is determined by the specific reference and movement; standard Aquanaut moonphases use a window roughly 6–8mm in diameter. Check the QC photographs for the exact proportions on your unit.

The moonphase is integral to the movement; it cannot be serviced separately. If the mechanism requires attention, the entire movement typically needs professional service. Our 12-month warranty covers manufacturing defects.