Citizen Promaster Geo Trekker BY3005-56G
Ref. BY3005-56G · Black dial · In production
- Case46 mm
- Water res.200 m
- MovementSolar
- CrystalSapphire
Citizen Promaster Geo Trekker BY3005-56G size, specs and price at a glance
The Citizen Promaster Geo Trekker BY3005-56G is 46 mm wide. Citizen does not publish its lug-to-lug length. It takes 22 mm straps and ships on a bracelet. Inside is the H864 solar calibre, water resistant to 200 m. US list price: $875 when we last checked citizenwatch.com (3 Nov 2026).
Strap shopping? See our Citizen lug width chart.
Overview
The Citizen BY3005-56G is a gmt watch from the Promaster collection, part of the Promaster Geo Trekker family. It has a 46 mm stainless steel case. Citizen lists the dial as black. Inside is a solar movement (calibre H864). You also get 200 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 18.5–20.4 cm (7.3–8.0 in), by our Watch Finder sizing guide
- Swimming, snorkelling and diving
- Frequent travellers who track two time zones
- Grab-and-go wear without winding or setting
Strengths
- Sapphire crystal resists scratches
- 200 m water resistance
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 46 mm | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Lug-to-lug | Not published by Citizen | |
| Case material | Stainless steel | citizenwatch.com · 3 Nov 2026 |
| Crystal | Sapphire | citizenwatch.com · 3 Nov 2026 |
| Water resistance | 200 m | citizenwatch.com · 3 Nov 2026 |
Dial
| Dial colour | Black | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| GMT / second time zone | Yes | citizenwatch.com · 3 Nov 2026 |
| Power-reserve indicator | Yes | citizenwatch.com · 3 Nov 2026 |
Movement
| Movement type | Solar | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Calibre | H864 | citizenwatch.com · 3 Nov 2026 |
Strap / Bracelet
| Bracelet / strap | Bracelet | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Lug width | 22 mm | citizenwatch.com · 3 Nov 2026 |
Other
| US list price (MSRP) | $875 | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Production status | In production | citizenwatch.com · 3 Nov 2026 |
| Style (our classification) | GMT | our classification |
Specs are summarised in our own words from the brand's product page. Each row links its source and the date we checked it. Fields we haven't verified are left out rather than guessed.
Variants with the same specs
Same case, movement and bracelet or strap; typically a different dial or finish.
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Similar alternatives
Picked with Watch Finder's style tags and sizing.
Questions about the Citizen Promaster Geo Trekker BY3005-56G
How big is the Citizen Promaster Geo Trekker BY3005-56G?
The case is 46 mm wide.
What movement does the Citizen Promaster Geo Trekker BY3005-56G use?
It uses the H864 calibre, a solar movement.
Can I swim with the Citizen Promaster Geo Trekker BY3005-56G?
Yes. It is rated to 200 m.
How much is the Citizen Promaster Geo Trekker BY3005-56G?
The US list price was $875 on citizenwatch.com when we checked on 3 Nov 2026. Prices change, so check before you buy.
Will the Citizen Promaster Geo Trekker BY3005-56G fit my wrist?
By our sizing guide it sits best on wrists of about 18.5–20.4 cm (7.3–8.0 in). Use the fit checker on this page to test your own wrist.
Watch.co is independent and not affiliated with any brand. Brand names are used only to identify products.