Orient · Orient F6N43

Orient Star Contemporary and Orient Star Outdoor power reserve: inside the F6N43

The Orient Star Contemporary Date and the Orient Star Sports Outdoor field watches run on the in-house F6N43, which shows its own power reserve on the dial. From a full wind it lasts about 50 hours, just over two days.

Updated September 2026 · Based on manufacturer specs, published reviews and watchmaker/owner reports

Watches that use the Orient Star F6N43

Orient Star is Orient's higher-grade line, and its signature is a power reserve indicator on the dial of watches that cost far less than most rivals with one. The F6N43 is the date-and-power-reserve version of the F6 movement family used in several of them. The Orient Star Diver 1964 uses a close sibling, the F6N47, with the same 50-hour reserve.

Specs at a glance

History and where it came from

Orient has fitted power reserve indicators to affordable Orient Star watches for years. Worn & Wound's review of the Orient Star Classic, for instance, covers the older 40N52, a 22-jewel, 3 Hz automatic with hacking, hand-winding, date and power reserve indicator. It praised Orient as one of the only reputable brands offering that complication at the price.

The F6N43 is the F6-family successor. Caliber Corner describes it as an evolution with the power reserve raised to 50 hours from a full wind, and says it arrived with Orient Star's Outdoor line of sports watches in 2019. Orient's own manual for the F6N family confirms the key figures: 21,600 vibrations an hour, +25 to -15 seconds a day, and at least 50 hours of running time.

Today the F6N43 is the movement in the compact Orient Star Contemporary Date, including a 75th-anniversary edition, while the ISO-rated Diver 1964 uses the closely related F6N47. Above them, Orient Star's newer F7 and F8 movements add small seconds, moonphases and, in hand-wound versions, up to 70 hours.

Accuracy in the real world

Orient rates the F6N43 at +25 to -15 seconds a day. Its manual is specific about how that's measured: 24 hours after a full wind, at room temperature, dial up. It recommends judging the rate over about a week rather than a single day, and wearing the watch at least 8 hours a day to keep the rate stable.

Owner reports are mostly good. On Caliber Corner's F6N43 page, owners report one watch at -3 seconds a day after three months and another who owns three and finds them more accurate than more expensive watches. There's also a report of an Outdoor that began stopping and ran about a minute fast a day even after demagnetization, which was a warranty case. Like Orient's cheaper F6 movements, it isn't finely regulated at the factory, so there's variation.

Reliability and servicing

The F6 family has a good reputation for toughness, and the F6N43 shares most of its design with the movements in millions of Orients. Serious faults are uncommon, but they do happen, as the Caliber Corner report shows.

• Use the warranty. Orient Star watches are often bought at a discount from grey sellers. If a new one runs badly, a watch covered by an official warranty is much easier to sort out.
• Independents. It's a conventional Japanese automatic, but some owners find local watchmakers reluctant to take on Orient Star movements. Ask before you book.
• Parts. It's used only in Orient Star watches, so it isn't a cheap drop-in replacement like an NH35. Expect to service rather than swap.

Quirks worth knowing

• The power reserve indicator is the point. It shows how much of the 50 hours is left, so you can see when an Outdoor or Contemporary needs winding instead of guessing.
• Winding by hand. Turn the crown clockwise in the pushed-in position. Turning it the other way does nothing. About 30 turns fills it from stopped, and the indicator shows when you're full.
• Screw-down crowns. Sports models have a screw-down crown. Unscrew it before winding or setting, and screw it back down afterwards.
• Setting the date. The date quick-sets from the first crown position. Orient warns against doing it between 8pm and 2am. Here's why.
• Getting it going. If it stops, Orient says swing it back and forth ten or more times, or wind it, before setting the time.

How it compares

• Orient F6922 / F6724: the Orient-brand siblings in the Kamasu and Bambino. Same 3 Hz beat and similar tolerance, but 40 hours and no power reserve indicator.
• Seiko 6R35: the obvious rival in the Presage and Prospex. 70 hours, but no power reserve indicator on most models, and a similar tolerance.
• Seiko 6R27: Seiko's closest equivalent in the Presage: a pointer date and power reserve hand, with a faster 4 Hz beat but a shorter 45-hour reserve.
• Powermatic 80: in Tissot's PRX and Gentleman. Longer reserve at 80 hours, but no power reserve display.

Living with the 50-hour reserve

Fifty hours is where a reserve starts to be forgiving. Take your Orient Star Contemporary off at 10pm on Friday and it will run until about midnight on Sunday, so it stops just before the week starts. Take it off at 6pm on Friday after a full day of wear and it's still running on Sunday evening, which a 40-hour Kamasu or Bambino can't manage.

The indicator tells you where you stand, but only if you look at it. Watch Winder counts down the reserve for each watch you own and reminds you before it stops, so the Outdoor on the shelf doesn't quietly run down while you wear something else. For a one-off check, the "Will my watch stop?" calculator tells you whether it'll still be running.

Verdict

The F6N43 gives Orient Star watches the feature that sets them apart: a working power reserve indicator on a hacking, hand-winding in-house automatic, backed by a 50-hour reserve that nearly gets through a weekend. It's not a high-precision movement, the spec is the same as Orient's cheaper calibers, and servicing is less universal than a Seiko NH35. But in an Orient Star Contemporary or Outdoor, it's one of the best-value complications in watchmaking.

FAQ

How long does an Orient Star Contemporary run off the wrist?

About 50 hours from a full wind with the F6N43. The power reserve indicator on the dial shows how much is left.

Does the Orient Star Outdoor hack and hand-wind?

Yes. The F6N43 stops the seconds hand when you pull the crown out to set the time, and it winds when you turn the crown clockwise.

How accurate is the Orient Star Contemporary Date?

Orient rates the F6N43 at +25 to -15 seconds a day. Many owners report much better, though results vary from watch to watch.

Will my Orient Star Outdoor last the weekend?

From a full wind it runs about 50 hours, so a watch taken off on Friday evening will usually still be running on Sunday evening but will stop overnight.

How many crown turns does the Orient Star F6N43 need?

Orient says about 30 clockwise turns fully winds it from stopped. You can also watch the power reserve indicator.

Is the Orient Star Diver 1964 the same movement?

It uses the F6N47, a close sibling with the same 22 jewels, 3 Hz beat, 50-hour reserve and power reserve indicator.

Why is my Orient Star running fast?

A sudden gain is often magnetism, which a watchmaker can fix in minutes. If it's still well outside +25 to -15 seconds a day after that, take it back under warranty.

Sources

• Orient UK: Orient Star Contemporary Date RE-AU0112V specifications
• Caliber Corner: Orient caliber F6N43
• Orient Star: F6N/F6R/F6F/F6G instruction manual (PDF)
• Monochrome: Orient Star Diver 1964 2nd Edition
• Worn & Wound: Orient Star Classic review

Keeping it running

• On an average day an automatic gains roughly 4 hours of reserve per hour on the wrist, so about 12 hours of wear fills the Orient F6N43. Desk days charge more slowly.
• Most automatics can also be wound by the crown. If yours has stopped, a few dozen turns gets it going before you put it on.
• Off the wrist it stops about 50 hours after it was last full. Stopped sooner?
• On a watch winder, start at about 650 turns per day, both directions. Winder settings for every movement.
• If it does stop, don't set the date between 9pm and 3am. Check if it's safe.

All Orient movements

Never let it stop

Watch Winder counts down the reserve of every watch you own and reminds you before one stops. It already knows the Orient F6N43: type your watch's name and the reserve fills itself in.

Manufacturer's published figure. Real reserve varies with the watch's age and service; check your manual.