Case #742 — Longines Spirit Zulu Time Green 42mm Ref. l3.812.4

Case #742 — Longines Spirit Zulu Time 42 mm "Green Bezel"

Ref. L3.812.4.63.6

Status: Available

Condition: Very Good Pre-Owned

Scope: Watch and Presentation Box

Year: Unknown

🔎 Case Notes

Green is the colour Longines chose to make its traveller's watch look like a tool rather than a trophy. On this 42 mm Spirit Zulu Time, the bidirectional rotating bezel carries a green ceramic insert with an engraved 24-hour scale, lacquered numerals and a Super-LumiNova triangle — set against a dark sunray dial that reads brown-black depending on the light, with warm gilt-toned hands and applied numerals. It is a quietly assertive combination, and one of the more characterful configurations in the Spirit line.

Underneath the aviation styling sits the real argument for this reference: the COSC-certified automatic Calibre L844.4, made exclusively for Longines, offering a power reserve of approximately 72 hours, with Flyer-GMT functionality that allows the local hour hand to be adjusted independently in one-hour increments in both directions via the crown. That is true traveller's-GMT architecture, not a caller complication — a specification normally associated with watches costing considerably more.

This example comes to us on its stainless steel bracelet with folding clasp, currently sized to fit an approximately 7¼-inch wrist. It is graded Very Good Pre-Owned; no specific flaws were recorded during physical inspection, though the grade reflects a watch that has been worn and enjoyed rather than preserved. It is offered as Watch Only — no box, papers or cards accompany it.

🕰️ The Evidence

• Reference: L3.812.4.63.6
• Model / Collection: Longines Spirit Zulu Time
• Year: Unknown
• Case: Stainless steel
• Case Diameter: 42 mm
• Thickness: Approximately 13.9 mm
• Lug Width: 22 mm
• Dial: Dark brown/black sunray with applied Arabic numerals and Super-LumiNova
• Crystal: Scratch-resistant sapphire with anti-reflective coating
• Bezel: Bidirectional rotating, green ceramic insert, engraved 24-hour scale with lacquered numerals and Super-LumiNova triangle
• Movement: Longines Calibre L844.4, automatic, made exclusively for Longines
• Movement Detail: 21 jewels, 25,200 vibrations per hour, magnetically resistant with silicon balance spring
• Certification: COSC officially certified chronometer
• Power Reserve: Approximately 72 hours
• Functions: Hours, minutes, central seconds, date, 24-hour hand with time-zone mechanism
• Water Resistance: 100 metres
• Bracelet: Stainless steel
• Clasp: Folding clasp with push-piece opening mechanism
• Bracelet Fit: Approximately 7¼-inch wrist
• Condition: Very Good Pre-Owned
• Included: Watch only

🌟 Collector Provenance

The Spirit collection arrived in 2020 as Longines' vintage-inspired line of aviation-leaning watches with COSC automatic movements, offered initially in time-and-date and chronograph form — and notably not designed as a reissue of any single vintage model. It was a composite of Longines' pilot-watch vocabulary rather than a facsimile, which is partly why it aged well.

The Zulu Time joined the collection in 2022 and immediately became the enthusiast's choice within the family. The reason is the movement. The L844.4 is an exclusive and extensively modified version of the ETA A31 calibre, and its independently jumping local hour hand puts it in the same functional category as GMTs from considerably more expensive houses. Add a silicon balance spring and magnetic resistance an order of magnitude beyond ISO 764 requirements and the specification sheet starts to look unusual for the segment.

Within the Zulu Time sub-collection, the green-bezel variant is the most visually committed. Where the blue and anthracite versions can pass as formal-adjacent, the green ceramic insert over a dark gilt-accented dial reads as a deliberate design statement, and it is encountered less frequently on the secondary market than the core anthracite and blue executions. The 42 mm size — rather than the 39 mm — is the one that most closely preserves the collection's original pilot-watch proportions.

🌟 Historical Provenance

The name is not marketing invention. It refers to the 1925 Longines wristwatch — the brand's first to indicate a second time zone — which carried the Z signal flag on its dial; "Z" denotes Zulu Time, the military and navigational term for Coordinated Universal Time. That 1925 piece was the first Longines wristwatch to feature a dual time-zone display, which makes the modern Zulu Time a genuine lineage product rather than a borrowed story.

The wider context is Longines' long association with navigation and aviation instrumentation — the practical business of knowing what time it is somewhere else, which is precisely what the 24-hour bezel and independent hour hand on this watch exist to answer.

🧾 From the Case File

The case practicalities matter here. At 42 mm wide and approximately 13.9 mm thick, this is a substantial watch, but the Spirit's downturned lugs and the bracelet's taper keep it sitting flatter than the numbers suggest. It is currently sized for an approximately 7¼-inch wrist; additional links are not included, so buyers with larger wrists should plan accordingly, while smaller wrists can simply have links removed.

Functionally, the Flyer-GMT layout is the one frequent travellers actually want: land, pull the crown, click the local hour hand forward or back, and the 24-hour hand keeps home time running without touching the minutes or seconds. The roughly 72-hour power reserve means the watch survives a weekend in the drawer, and 100 metres of water resistance covers swimming and ordinary daily exposure without ceremony.

The 22 mm lug width is a gift for strap experimentation — the dark gilt dial and green bezel take extremely well to olive, khaki and brown leather or textile, giving this a second personality off the bracelet.

As a Very Good Pre-Owned, Watch Only example, this is for the buyer who wants the configuration and the calibre rather than the packaging. No specific flaws were recorded at inspection, but the grade should be read honestly: this watch has been worn, and light handling marks consistent with that are to be expected. We make no claim as to service history, current timekeeping performance, or remaining factory warranty, as none was supplied with the watch.

🗝️ BST Verdict

A proper traveller's GMT with a chronometer-certified, independently jumping hour hand — in the most design-forward colourway Longines offers in the Spirit Zulu Time line.

Offered sensibly as Watch Only and honestly graded, it suits the collector who buys movements and configurations rather than cardboard.

👉 Every case deserves a closer look.