AGELOCER Astronomer Moonphase Watch — Cal.A4610, 6401 & 6404 Series, All Eight Variants

AGELOCER Astronomer Moonphase Watch — Cal.A4610, 6401 & 6404 Series, All Eight Variants

The AGELOCER Astronomer Moonphase range covers eight variants across two dial series and multiple case/bezel configurations — all powered by the Cal.A4610 in-house automatic with 80-hour power reserve, 28,800 vph, 27 jewels and a 28.5mm panoramic moonphase display. 40mm, 11mm, synthetic sapphire crystal, exhibition caseback, Italian crocodile-pattern leather strap, 50m water resistance.

This page covers all eight variants. See the core Astronomer page for the full Cal.A4610 movement specification and moonphase mechanism explanation.

Key Specifications — All Variants

Complete Variant Guide — Eight Models

The eight variants divide across two dimensions: dial series (6401 panoramic vs 6404 classic starry) and configuration (case colour × bezel type).

6401 Series vs 6404 Series — What’s Different

6401 Panoramic Moonphase: The moonphase display is the dominant dial element — the 28.5mm aperture occupies the majority of the dial surface, presenting the moon and celestial artwork as the primary visual. The hour markers and hands sit around and above the large moonphase window. This is the watch for buyers who specifically want the moonphase as the focal point.

6404 Classic Moonphase Starry Dial: A more conventional moonphase layout — the starry night sky background creates the celestial character while the moonphase display is present but less dominant than on the 6401 series. The overall dial balance is closer to a traditional dress watch with a moonphase complication added.

Choose 6401 if the moonphase window is the dial feature you want to lead. Choose 6404 if you want the celestial aesthetic without the moonphase dominating the entire dial surface.

Bezel Options — Smooth vs Crystal-Set

Smooth bezel (A1, D2): A clean polished bezel edge with no additional decoration — the most formally restrained and appropriate for business or formal wear. The watch reads as a dress watch with a moonphase complication.

Crystal-set bezel (E1, F2): The bezel edge features decorative crystals set into the case rim — adding a jewellery-influenced character to the watch. The crystal-set bezel shifts the watch’s character toward evening and occasion wear. The F2 variants (rose gold + crystal-set) create the most formally elaborate combination in the range.

Case Colour Options

Silver stainless steel (A1, E1): Cool-toned brushed and polished steel — the most formally versatile, appropriate with any strap colour and any suit or dress combination.

Rose gold tone (D2, F2): Warm rose gold PVD coating over steel — the warm case tone paired with the dark brown crocodile strap creates a cohesive warm palette. The rose gold case shifts the watch character toward vintage-inspired formal wear.

Exhibition Caseback

The Cal.A4610 movement is visible through the sapphire exhibition caseback — blue screws throughout, engraved rotor with AGELOCER branding and decorative finishing on the bridges. The 28,800 vph beat rate means the balance wheel oscillates 8 times per second — visible as continuous high-frequency oscillation through the caseback.

Moonphase Accuracy

The mechanical moonphase disc completes one cycle approximately every 29.5 days — matching the lunar synodic period. The mechanical approximation accumulates approximately one day of offset over 2.5 years, at which point the moon disc requires manual correction. This is standard for all mechanical moonphase complications regardless of price or manufacturer.

Which Astronomer Variant Should You Choose?

Most versatile: 6401A1 (silver, smooth bezel, panoramic) — the clearest moonphase display on the most formally appropriate case.

Most distinctive: 6401F2 (rose gold, crystal-set bezel, artistic panoramic) — the most elaborate combination and furthest from conventional dress watch aesthetics.

Most traditional: 6404A1 (silver, smooth bezel, classic starry dial) — the closest to a conventional moonphase dress watch in the range.

Most occasion-specific: 6404E1 or 6404F2 (crystal-set bezel variants) — for evening wear and formal events where the crystal bezel adds appropriate decorative character.

Who Is the AGELOCER Astronomer For?

Across all eight variants the Astronomer is for:

• Cal.A4610 in-house 80-hour moonphase buyers who want AGELOCER’s own caliber rather than Seiko or Miyota
• Rose gold case buyers who want warm-tone case metal on an in-house automatic moonphase
• Crystal-set bezel buyers who want the decorative bezel treatment on a mechanical moonphase dress watch
• Celestial/astronomical dial buyers who want the starry night aesthetic on a genuine in-house movement

How It Compares

vs. AGELOCER Astronomer (core page) — The same watch and movement range — this page provides the complete variant guide; that page provides the full Cal.A4610 technical explanation.

vs. Seagull 816.423 Moonphase — Seagull uses ST21 in-house with moonphase + power reserve indicator + pointer date on steel bracelet. AGELOCER uses Cal.A4610 in-house with larger 28.5mm moonphase on leather. Different movement sources and complication emphasis.

vs. OUPINKE 3189 Plamont Moonphase — OUPINKE uses Plamont automatic with full calendar. AGELOCER uses Cal.A4610 in-house with the largest moonphase display in the range.

More from Jewelry Addicts

• AGELOCER Astronomer — Full Technical Review — Cal.A4610 movement explained
• AGELOCER Budapest Cal.A4610 — same Cal.A4610 in dress watch without moonphase
• Seagull 816.423 Moonphase — moonphase + power reserve + pointer date alternative
• Best Moonphase Watches Under $500 — full moonphase buying guide
• AGELOCER Watches — full AGELOCER range