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Bremont Longitude Limited Edition

With this limited edition collection, Bremont pays tribute to Great Britain’s role in clock and watchmaking, and contribution to time, astronomy and navigation.

The classic yet contemporary design of the Bremont Longitude watch marks a significant milestone in this journey. Not only does the Longitude house the brand’s first manufactured movement from its new ENG300 movement series but it also incorporates original brass from the historic Flamsteed Meridian Line at the Royal Observatory Greenwich, London.

At Greenwich, the brass Flamsteed Meridian line marks the historic position where the first Astronomer Royal, John Flamsteed, made his observations and laid the foundations for accurate timekeeping and navigation.

Bremont has made considerable investment into new machinery, staff and training and the firm’s in-house technical team has modified the base K1 calibre, for which it has acquired the full rights to manufacture and re-engineer from Swiss firm “THE+”.

The ENG300 series is the result of Bremont re-engineering 80% of the base calibre, including making a number of design improvements, in order to build a proprietary movement to the brand’s unique specification. A new manufacturing line for machining base components through to T3 assembly is set up in the new Bremont Manufacturing & Technology Centre “The Wing” based in Henley-on-Thames, UK.

Introduced in 2021, the Limited Edition Longitude is the first timepiece to house the new Bremont movement. The ENG300 series comes with an increased warranty of 5 years.

Equipped with 22 jewels, the ENG376 movement boasts excellent technical specifications. With a depth of 4.95mm and diameter of 25.6mm, this self-winding caliber features a silicon escapement and a custom balance bridge and full tungsten rotor both designed to reflect the architecture of Bremont’s state-of-the-art headquarters at The Wing, the home of British watchmaking. Renowned for beautifully made, yet robust and shock-proof timepieces, Bremont sought to make improvements wherever there was an opportunity to enhance the toughness of the base calibre.

One notable improvement was choosing to utilise a full balance bridge, which supports the balance wheel assembly. To fine tune the movement’s accuracy, traditional adjustment screws are used on the free sprung balance wheel, a more difficult method of rate adjustment, but also more precise, and links back to early marine chronometry.

Further design changes include revisions to the escapement, the automatic winding bridge jewels and a modified wheel bridge amongst others.

Original brass from the historic Flamsteed Meridian Line at the Royal Observatory Greenwich, London, can be seen forming a ring in the back of the Longitude timepiece, engraved with the serial number of the watch.

With a power reserve of 65 hours, this special timepiece has its power reserve indicator at the 6 o’clock position resembling the Royal Observatory Greenwich’s red time ball, a simple yet ingenious visual device that gave nineteenth century sailors accurate time. The Longitude also features a big date function and an off-set seconds hand at 9-o’clock.

With only a very exclusive run of 150 steel, 75 rose gold and 75 white gold pieces available, the Longitude is the first of Bremont’s historic Limited Editions to be produced at The Wing, a 35,000 square foot facility which was custom designed to enable Bremont’s manufacture of great British watches.

Technical details


Bremont 11 1/2” ENG-376 automatic movement, 22 Jewels
Silicon escape wheel and pallet running at 25,200bph (3.5Hz)
Free sprung hair spring with inertia weight timed balance & KIF Shock protection
Uni-Directional winding with solid Tungsten oscillating weight
65h Power Reserve
Rhodium plated bridges with gold plated automatic bridge
Blued bridge screws

Central hour and minute
Running seconds at 9H
Power reserve indicator at 6H
Big date at 3H

Polished Stainless Steel, Polished 18ct Rose Gold, Polished 18ct White Gold
Bremont Trip-Tick® construction with scratch resistant PVD treated case barrel
Screw down onion crown.
Case diameter: 40mm
Case Length: 49mm
Lug width: 20mm
Depth: 12.5mm
Domed anti-reflective, scratch resistant sapphire crystal

Polished Stainless Steel, Polished 18ct Rose Gold, Polished 18ct White Gold case back with integrated flat sapphire crystal, with four polished screws of matching material. Ring of meridian line insert set behind the sapphire crystal with Longitude coordinates for the Royal Observatory in Greenwich and The Wing – Bremont’s Manufacturing and Technology Centre.

Metal dial with raised central globe with debossed longitude lines
Meridian line running from 12H to 6H
Chapter ring with a minute track, marked at 5min intervals
Polished applied Roman numerals at 12H
Polished applied hour markers filled with SLN. Recessed running seconds sub dial marked at 15 sec intervals
Big Day at 3H
Power reserve indicator at 6H, coloured to represent the red ball at the top of the Royal Observatory in Greenwich building
Polished nickel plated hands

Water resistance
Stainless Steel: 10 ATM, 100 metres.
Rose Gold: 5 ATM, 50 metres.
White Gold: 5 ATM, 50 metres.

Stainless Steel: Alligator embossed calf leather.
Rose Gold: Brown Alligator.
White Gold: Black Alligator.

Longitude Stainless Steel: Limited edition of 150 pieces
Longitude Rose Gold: Limited edition of 75 pieces
Longitude White Gold: Limited edition of 75 pieces

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