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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11The Citizen Series 8 880 Mechanical GMT is a family of automatic watches, not one single reference. Its key travel feature is the Cal. 9054 movement’s independently adjustable local-hour hand; paired with the rotating 24-hour bezel, Citizen says it can display up to three time zones. The exact dial, finish, and some specifications depend on the model reference and market.
What is the Citizen Series 8 880 Mechanical GMT?
Citizen uses “880 Mechanical GMT” for a group of Series 8 watches equipped with the Cal. 9054 automatic movement. The family includes references such as NB6031-56E and NB6030-59L, announced in 2023, as well as NB6033-51E and limited editions NB6036-52N and NB6035-55H. A reference number matters: it identifies the particular dial, finish, edition, and market listing being discussed.
The 2023 Hong Kong announcement describes the NB6031-56E and NB6030-59L, while Citizen’s regional product pages list the NB6033-51E and NB6036-52N. These are manufacturer specifications, not independent test results. Citizen Hong Kong’s 2023 announcement, Citizen US’s NB6033-51E page, and Citizen Canada’s NB6033-51E page provide reference-specific information.
How does the GMT hand work?
Changing local time while traveling
Citizen describes the Cal. 9054 as having an independently adjustable hour hand, which the company also calls a traveler GMT mechanism on its US product page. When changing time zones, the local hour hand can be adjusted independently, without resetting the watch’s other time display. Citizen’s wording on the NB6033-51E product page is: “The Calibre 9054 powers the watch with an automatic movement featuring an independently adjustable hour hand, also known as a traveler GMT mechanism.”
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Reading a second or third time zone
The GMT display provides a reference time, while the rotating 24-hour bezel lets the wearer read another time-zone offset. Citizen says the GMT display and bidirectional bezel can be used together to show up to three time zones. The number of time zones shown is a display capability; it does not mean the watch independently tracks three local-hour hands.
Core specifications—and what varies by reference
The headline specifications are broadly consistent across the cited 880 GMT models, but confirm a detail against the exact reference and country page before relying on it. Citizen’s regional pages do not all publish the same level of detail.
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| Specification | What Citizen states |
|---|---|
| Movement | Cal. 9054 automatic; the 2023 Hong Kong announcement also lists manual winding, 28,800 vibrations per hour, and 24 jewels for NB6031-56E and NB6030-59L. |
| Case size | 41 mm diameter. The 2023 Hong Kong announcement gives 13.5 mm thickness for NB6031-56E and NB6030-59L as a design specification. |
| Power reserve | Approximately 50 hours in Citizen’s cited specifications. |
| Stated accuracy | Average −10 to +20 seconds per day in the 2023 Hong Kong announcement; the US NB6033-51E page lists +20/−10 seconds per day. |
| Water resistance | 10 bar / 100 m on the cited product information and announcement. |
| Crystal and bracelet | Sapphire crystal is listed in Citizen’s cited materials; the Hong Kong announcement specifies anti-reflective coating. Citizen Canada’s listed variants include a stainless-steel bracelet. |
| Magnetic resistance | Up to 16,000 A/m for NB6033-51E on Citizen’s US product page. |
Citizen’s stated accuracy is an average specification, not a promise that the watch will keep that rate in every situation. Its 2023 announcement says daily accuracy may vary with wearing time, position, wrist movement, and the condition of the mainspring. The figure is not an independent measurement of an individual watch.
Which 880 GMT references are covered by the cited materials?
NB6031-56E and NB6030-59L
Citizen Hong Kong’s August 2023 announcement covers these two models and lists the Cal. 9054, 41.0 mm diameter by 13.5 mm thickness, sapphire crystal with anti-reflective coating, enhanced magnetic resistance, 10 bar water resistance, and the movement figures in the table above. Consult the announcement for the exact design shown for each reference.
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NB6033-51E
Citizen’s US listing identifies this as a black-dial stainless-steel-bracelet model. It specifies a 41 mm case, 100 m / 10 bar water resistance, Cal. 9054, approximately 50 hours of power reserve, magnetic resistance up to 16,000 A/m, and average accuracy of +20/−10 seconds per day. See Citizen US’s product page; the Canadian listing is a separate market page.
NB6036-52N limited edition
Citizen’s August 2024 announcement describes the NB6036-52N with a mother-of-pearl dial and a planned September 2024 launch. It gave a projected US$1,995 price and a limited quantity of 2,200 worldwide, alongside 41.0 mm by 13.5 mm design dimensions, sapphire crystal with anti-reflective coating, Cal. 9054, and 10 bar water resistance. Those price and quantity figures describe the launch announcement, not present-day availability or current pricing. Details appear in Citizen’s 2024 announcement.
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NB6035-55H limited edition
Citizen’s September 2025 announcement scheduled the NB6035-55H for October 2025, with a projected US$1,800 launch price and limited quantity of 1,600 worldwide. The announcement lists Cal. 9054, approximately 50 hours of power reserve, and 10 bar water resistance. These are historical launch details; they do not establish current price or stock. See Citizen’s 2025 announcement.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is the Series 8 880 GMT a traveler’s GMT?
Yes: Citizen describes the Cal. 9054’s independently adjustable hour hand as a traveler GMT mechanism. That is useful when the wearer changes local time, while retaining a reference time on the GMT display. “GMT” alone does not establish how a watch’s hands adjust, so this description applies to the cited Cal. 9054 models rather than every GMT watch.
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What to check before choosing a reference
- Match the reference. Check the full model number on the product page or listing, especially when comparing dial color, case finish, or limited-edition status.
- Use the relevant country page. Citizen’s US, Canadian, Hong Kong, and global announcement pages cover different references and may present different specification detail.
- Treat launch prices as historical. The limited-edition prices above were projected at announcement; the cited sources do not establish current retail prices, resale prices, or remaining stock.
- Read accuracy as a manufacturer specification. Citizen notes that real-world rate can vary with wearing and winding conditions; the cited materials do not provide a controlled comparison with other GMT watches.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
