BERNY AM7042M Grand Complication Automatic Watch — Seagull ST1652, 40mm, Annual Calendar, Day/Night

BERNY AM7042M Grand Complication Automatic Watch — Seagull ST1652, 40mm, Annual Calendar, Day/Night

The BERNY AM7042M is a 40mm Seagull ST1652 automatic grand complication watch — annual calendar with day sub-dial, date hand (1–31 arc), month sub-dial, 24-hour indicator, day/night sun-moon display at 6 o’clock, tachymeter scale, Roman numeral chapter ring, four push-correctors on the case flanks, mineral glass exhibition caseback, 316L stainless steel case at 14.5mm, genuine crocodile-embossed leather strap with pin buckle, 3ATM water resistance, 71g. Three variants.

Day/night display note: The sun-moon display at 6 o’clock is a day/night indicator — it follows the main hour hand and rotates once per 24 hours, showing a golden sun above the dial during AM hours and a starry night sky during PM hours. It is not an independent moon phase complication — it cannot be set independently and does not track the lunar cycle. The listing markets this as a “Sun & Moon Phase” display; the accurate description is a 24-hour day/night indicator.

Key Specifications

Variants — Three Confirmed Configurations

AM7042M-Y (gold): Gold-tone case / white dial / brown leather strap — the most ornate and formally decorative.

AM7042M-B (silver): Silver case / white dial / black leather strap — the most neutral.

AM7042M-A (black): All-black PVD case / black dial / black leather strap — the most contemporary.

Seagull ST1652 — Annual Calendar Movement

The ST1652 (also designated TY2876) is a Seagull ST16 family automatic: date, day and month display, 24-hour indicator, 21 jewels, 21,600 vph. The ST16 family is Seagull’s in-house movement series — featuring automatic winding, a power reserve of 40 hours, 21 jewels, and vibrating at a frequency of 21,600 times per hour.

The ST1652 drives five simultaneous displays: central seconds, day of week, date arc, month and 24-hour/day-night indicator. The four push-correctors on the case flanks allow independent correction of the day, date and month without running the hands through multiple 24-hour cycles.

Day/Night Indicator — Not a Moon Phase

The sun-moon display at 6 o’clock is a 24-hour day/night indicator. A rotating disc shows a golden sun disc during the AM hours and a deep blue starry sky during PM hours — the disc rotates once every 24 hours, driven directly from the movement’s 24-hour gear train.

This creates a visually compelling display of whether it is currently day or night — useful as a dual-time or AM/PM reference. However it is important to distinguish this from a true moon phase complication:

• A moon phase tracks the 29.5-day lunar cycle independently
• The ST1652 day/night indicator follows the main time hand and completes one rotation per 24 hours

The two displays look similar on the dial but function completely differently. The AM7042M does not track the lunar cycle.

Five-Register Dial Architecture

The AM7042M is the most complex dial layout in the BERNY range — five simultaneous displays:

Day sub-dial (upper left): Sun through Sat with a dedicated sub-hand.

Month sub-dial (upper right): 1–12 with a dedicated sub-hand.

Date arc (lower right): A 1–31 arc with odd positions shown, swept by a pointer hand.

Day/night indicator (centre bottom): 24-hour rotating sun/moon disc.

24-hour scale: Outer ring running 1–24 for AM/PM reference.

The Roman numerals at IV, VII, X and I anchor the four quadrants. The tachymeter scale on the outermost ring allows speed calculation from elapsed time.

Setting the Complications

The four push-correctors on the case flanks adjust the calendar independently:

• Left correctors: day and month correction
• Right correctors: date correction
• Crown: time setting, manual winding

The day/night indicator follows the hour hand automatically — no independent setting required or possible.

14.5mm Case Thickness

At 14.5mm the AM7042M is the thickest watch in the BERNY range — the multi-layered sub-dial module adds significant height to the base ST16 movement. For buyers who want the full grand complication dial character, the 14.5mm thickness is the trade-off. The watch does not clear most shirt cuffs.

Who Is the BERNY AM7042M For?

The AM7042M is built for:

• Annual calendar automatic buyers who want day + date + month on a Seagull automatic at this price
• Baroque dress watch buyers who want the ornate multi-register dial, Roman numerals, knurled lugs and exhibition caseback combined
• Gold-tone complication buyers — the AM7042M-Y is the most elaborately decorated gold-tone automatic in the BERNY range
• Day/night indicator buyers who want the sun-moon rotating disc as a 24-hour AM/PM reference (understanding it is not a moon phase)

How It Compares

vs. BERNY 2262M Miyota 6P20 — 2262M uses Miyota 6P20 quartz with true moon phase + day + date at 40mm/10mm/60g. AM7042M uses Seagull ST1652 automatic with annual calendar + day/night indicator at 40mm/14.5mm/71g. Choose 2262M for the true moon phase; choose AM7042M for automatic movement and the annual calendar (month display).

vs. BERNY AM050M Miyota 9110 — AM050M has power reserve + day + date + 24H at 43mm. AM7042M has annual calendar + day/night + tachymeter at 40mm. Both are multi-complication automatics — AM050M has power reserve; AM7042M has the month display.

More from Jewelry Addicts

• BERNY 2262M Moon Phase Quartz — true moon phase quartz alternative
• BERNY AM050M Miyota 9110 — power reserve automatic alternative
• BERNY Watches — full BERNY range