BERNY AM079VM Open-Heart Automatic Watch — Seiko NH38, 38.5mm, Roman Numerals, Sapphire Both Sides

BERNY AM079VM Open-Heart Automatic Watch — Seiko NH38, 38.5mm, Roman Numerals, Sapphire Both Sides

The BERNY AM079VM is a 38.5mm Seiko NH38 automatic open-heart dress watch — a left-side movement window showing the balance wheel and gear train through the dial, Roman numeral hour markers, wave-textured sunburst dial, slim hands, sapphire crystal front and sapphire exhibition caseback, 316L stainless steel case at 11.2mm and 47.5mm lug-to-lug, polished multi-link steel bracelet with butterfly clasp, 135g, 5ATM water resistance. Seven colour variants.

Key Specifications

Variants — Seven Configurations

AM079VM-YB: Yellow/beige dial — warm gold-tone character.

AM079VM-B: Black dial — the most formally understated.

AM079VM-A: Standard — confirm from listing image.

AM079VM-GRN: Green dial — contemporary and fresh.

AM079VM-GN: Olive green — more muted and vintage-adjacent than the brighter green.

AM079VM-C: Confirm colour from listing image.

AM079VM-LB: Light blue — the most delicate and dress-appropriate colour combination.

Seiko NH38 — The No-Date Open-Heart Caliber

The NH38 is Seiko’s no-date variant of the NH35A — the date mechanism is removed, which serves two specific purposes for open-heart watches:

Cleaner movement view: The date wheel and date mechanism occupy significant space within the movement. Removing them creates a more open movement architecture — more gear train and balance wheel are visible through the open-heart window.

Better dial composition: Without a date window required at 3 o’clock, the dial layout can be fully symmetrical around the movement aperture.

The NH38 retains all other NH35A characteristics: 24 jewels, 21,600 vph, hacking seconds and hand-winding, approximately 41-hour power reserve. It is globally serviceable with the same infrastructure as the NH35A.

Open-Heart Window — Left Side Position

The AM079VM places the open-heart aperture on the left side of the dial rather than the centre or 6 o’clock position. The left-positioned window preserves the Roman numeral dial legibility — all twelve numerals remain visible, the time-reading function is not compromised by the movement window. The balance wheel oscillation is visible at the aperture edge — 3 Hz (21,600 vph) creates the specific visual rhythm of a mechanical watch in operation.

Roman Numerals and Wave Texture

The dial combines two formal dress watch design elements:

Roman numerals: All twelve positions marked in Roman format. The Roman numeral dial is more formally ornate than baton markers — associated with European dress watch tradition rather than sport or field watch conventions.

Wave-textured sunburst: The dial surface has a radial wave or guilloché-style texture that shifts in tone as the viewing angle changes. The texture creates visual depth beneath the Roman numerals and the open-heart aperture — appropriate for a dress watch where the dial itself is a decorative object.

Sapphire Both Sides

Sapphire front crystal and sapphire exhibition caseback. The front sapphire protects the open-heart dial — a movement aperture is more vulnerable to contamination than a solid dial, so the sealed sapphire crystal maintains cleanliness of the visible movement components. The sapphire caseback presents the NH38 rotor from the rear — the movement is viewable from both directions simultaneously.

38.5mm × 11.2mm Dress Proportions

At 38.5mm the AM079VM is compact — proportioned for smaller wrists and formal dress contexts where large case diameters are inappropriate. The 11.2mm thickness is controlled for a 38.5mm bracelet watch — appropriate for sliding under shirt cuffs. The 47.5mm lug-to-lug is proportional (9.5mm lug extension on each side) — the watch sits close to the wrist without significant overhang.

AM079VM vs AM198M — Two BERNY Open-Heart Automatics

Both are BERNY open-heart automatics at Jewelry Addicts:

Choose AM079VM for the Roman numeral dress character, NH38 Seiko movement, compact 38.5mm and steel bracelet. Choose AM198M for the more aggressive 3D skeleton dial, nylon strap options, Miyota 82S0 and lighter weight.

Who Is the BERNY AM079VM For?

The AM079VM is built for:

• NH38 open-heart buyers who want Seiko’s no-date skeleton-specific caliber on a dress bracelet watch
• Roman numeral open-heart buyers who want the formal numeral format combined with movement visibility
• Light blue or olive green dial buyers who want the specific colour options on an NH38 dress automatic
• Compact 38.5mm dress watch buyers who want the smaller case on a formal steel bracelet automatic

How It Compares

vs. BERNY AM198M Miyota 82S0 — See comparison table above.

vs. LOBINNI 16067 NH39 Skeleton — LOBINNI uses NH39 at 43mm with partial skeleton and colour accents on leather. BERNY uses NH38 at 38.5mm with Roman numeral open-heart on steel bracelet. Both are Seiko no-date skeleton-specific caliber watches — different dial characters and case sizes.

vs. BERNY AM7110VM Seagull ST2130 — Both are BERNY dress automatics at ~38mm on leather or bracelet. AM7110VM has solid dual-lume charcoal dial; AM079VM has Roman numeral open-heart. Choose AM7110VM for Seagull in-house and 10ATM; choose AM079VM for the NH38 and movement visibility.

More from Jewelry Addicts

• BERNY AM198M Miyota 82S0 — full 3D skeleton BERNY alternative
• LOBINNI 16067 NH39 Skeleton — NH39 skeleton alternative
• BERNY AM7110VM Seagull ST2130 — solid dial BERNY dress automatic
• BERNY Watches — full BERNY range
• Best Automatic Watches Under $200 — full roundup