The Orient Mako GMT RA-BC0001B puts a second time zone on the familiar Mako sports case. Black sunburst, a red-tipped GMT hand, and a two-tone 24-hour bezel keep the extra information readable without turning the watch into a cockpit. It is a Japan-made automatic for travel days, desk days, and swimming — not a flyer GMT with a jumping local hour hand, and not an ISO-rated professional dive instrument. That honesty is part of why it works as an everyday Orient.
If you already like Orient Mako and Kamasu, this is the same design language with one extra hand and a 24-hour scale. The RA-BC0001B is the black tool-watch reference in the first Mako GMT family (full code RA-BC0001B30B). Sibling colours include the RA-BC0002E green GMT, the RA-BC0003L blue GMT, and the RA-BC0004Y orange GMT. Shop it as an in-stock Orient Mako GMT in Australia, with authentic stock inspected before dispatch.
Why the RA-BC0001B black GMT is easy to live with
- Second time zone without a second watch. The arrow-tipped GMT hand tracks 24-hour time; the unidirectional 24-hour bezel is how you offset home or destination time. The local hour, minute, and seconds hands stay together.
- Black that reads like a tool watch. Sunburst black, applied markers, lume, GMT text above 6, and the two-tone 24-hour bezel. This is the quietest colour in the launch set — the one that looks most like a traditional diver-style sports watch.
- Mako case, slightly larger than the 41.8 mm diver. 42.8 mm across, 49.5 mm lug-to-lug, 13.4 mm thick, 22 mm lugs. Presence without a 50 mm lug span.
- Sapphire and 200 m sealing. Scratch-resistant crystal, screw-down crown, screw case back. Fine for swimming and showering with the crown locked; not sold here as an ISO 6425 saturation diver.
- Steel bracelet with solid end links. Three-piece sports bracelet, push-button deployant clasp, 22 mm at the lugs — the usual aftermarket strap size if you later want rubber or NATO.
How this GMT actually works
Orient’s F6P22 drives a central 24-hour hand that is geared to the hour hand. You cannot jump the local hour independently the way a “true” or flyer GMT does. To read a second zone, you rotate the 24-hour bezel so the GMT hand points at the offset you need. That is the classic first-generation GMT layout: extra hand plus 24-hour bezel, not a travel-set complication. Date sits at 3 o’clock; there is no day-of-week disc (the standard non-GMT Mako still uses day-date).
Specifications
- Brand / collection: Orient Sports, Mako GMT
- Reference: RA-BC0001B / RA-BC0001B30B
- Dial: Black sunburst; applied markers; luminous hands and indices; GMT text above 6; red-tipped GMT hand
- Movement: Orient F6P22 automatic; hand-winding; hacking seconds; about 40-hour power reserve; quoted accuracy +25 to −15 seconds per day
- Functions: Hours, minutes, seconds, date at 3, 24-hour GMT hand
- Case: Stainless steel, 42.8 mm diameter, 49.5 mm lug-to-lug, 13.4 mm thick
- Crystal: Sapphire
- Crown / case back: Screw-down crown; screw case back
- Bezel: Unidirectional rotating 24-hour bezel
- Bracelet: Stainless steel with solid end links, 22 mm lug width, push-button deployant clasp
- Water resistance: 200 m / 20 bar (diver-style; not described as ISO 6425)
- Origin: Japan-made movement and watch
Who it is for
Buy the RA-BC0001B if you want a black Orient sports watch that can show a second zone on a rotating 24-hour bezel, and you are happy with a 42.8 mm steel case. Skip it if you need a true flyer GMT (independent local hour) or a compact 40 mm Mako. For colour in the same case, see the green RA-BC0002E or the orange RA-BC0004Y. Browse more Orient sports pieces in Orient divers.
Frequently asked questions
What movement is inside the Orient Mako GMT RA-BC0001B?
Orient calibre F6P22: in-house automatic with hand-winding and hacking seconds, about 40 hours of reserve, and a 24-hour GMT hand plus date. Quoted running order is +25 to −15 seconds per day.
Is the RA-BC0001B a true traveller GMT?
No. The GMT hand is linked to the hour hand. You set a second zone with the rotating 24-hour bezel, not by jumping the local hour independently.
What is the case size of the Orient Mako GMT?
42.8 mm diameter, 49.5 mm lug-to-lug, 13.4 mm thick, 22 mm lug width. That is a little larger than the 41.8 / 46.8 / 12.8 mm non-GMT Mako III / Kamasu case.
Is the crystal sapphire, and what is the water resistance?
Sapphire crystal. Water resistance is 200 metres with a screw-down crown and screw case back. Treat it as a sports and swimming watch, not an ISO professional diver.
Does the RA-BC0001B have a day-date window?
Date only, at 3 o’clock. The day disc used on many Makos is omitted so the GMT hand and 24-hour bezel have a cleaner dial.
Where can I buy the Orient Mako GMT RA-BC0001B in Australia?
Here at Chronospride. Authentic stock, inspected before dispatch. Free shipping Australia-wide on eligible orders. Covered by Chronospride’s 12 months warranty, handled by our team. See our authenticity and warranty page.
Authentic stock, inspected before dispatch. Free shipping Australia-wide on eligible orders. Covered by Chronospride’s 12 months warranty, handled by our team. See our authenticity and warranty page.
| Case-Size | 42.8mm |
|---|---|
| Band-Width | 22mm |
| Lug-Width | 22mm |
| Lug to lug size | 49.5mm |
| Case Thickness | 13.4mm |
