Seiko 4R36: specifications and comparison

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The Seiko 4R36 is one of the youngest movements made by the Japanese company and one of the most widely used for its watches today.

The 4R36 is considered the successor to the mythical 7S36 and is a more technically advanced caliber in terms of specifications, but just as inexpensive.

An automatic movement that now also integrates the desired functions for a second stop and manual winding in accordance with other current calibers.

In this post, we are going to give a full review of the Seiko 4R36’s features and compare it to other calibers in the same price range to determine its quality.

✚ Seiko 4R36 datasheet

Manufacturer Seiko
origin Japanese
model 4R36
Publishing year 2011
Move Automatically
Jewellery 24
Vibration frequency 21,600 vph
Energy reserve 40 hours
Dimensions 27.4mm x 5.32mm (diameter x depth)
precision +45 ~ -35 seconds / day
properties Hours, minutes and seconds on central hands and calendar
Stop seconds (hacking) And
Remonte manual And

✚ 4R36 in detail

The Seiko 4R36 caliber has been in the market since 2011 when it was introduced to replace the 7S36, one of the brand’s most reliable and respected movements, although it is already a bit dated.seiko 4r36

In fact, they are very similar on a technical level, but the 4R36 includes the requested functions of stop seconds and manual winding.

Like its predecessor, the 4R36 is an automatic movement with a bidirectional rotor based on the Magic Lever system and anti-shock lightning protection.

This means that it can recharge energy when the rotor moves in either direction and that it is resistant to drops and shocks. In fact, it is often mounted on sports and diving watches.

It also beats at 21,600 vph and has 24 jewels, which guarantees a longer lifespan with low maintenance.

The regulator is based on the Etachron system, which allows for easier adjustment of the spring and the possibility of achieving greater precision than that specified by the manufacturer.

➤ Accuracy

In terms of accuracy, the brand’s official data is +45 ~ -35 sec / day, although in practice it is usually much better.

When a manufacturer sets a range of precision, they are referring more to some type of classification where motion is to be localized, which is usually almost always more precise.

The normal thing is that it will be in about + – 15 seconds more. Every day, although a little more is paid to the watchmaker for a good fit, even better values ​​can be achieved.

We must keep in mind that these are inexpensive series movements that do not receive any special attention at the time of customization, but their design allows them to be carried out afterwards without further complications.

➤ Power reserve

The power reserve is approximately 40 hours when the mechanism is fully loaded either manually or through the natural movement of the wrist.

Thanks to manual charging, it is possible to keep the watch running even when you are not getting dressed. This is why this feature is so valued by collectors.

➤ Watches that use it

The 4R36 is an exclusive Seiko movement and can therefore only be seen in the brand’s watches, especially in sports and diving models.

Other brands include the NH36, an almost identical variant that Seiko makes itself for a third party, but it’s not a 4R36.

We find this mechanism mainly in Prospex series divers, Sport 5 Sports, and some Presage clothing models.

✚ Seiko 4R36A and 4R36 What’s the Difference?

There is no difference as it is the same movement. The letter A for Seiko 4R36A only indicates that it is the first version of the caliber.

If further versions appear in the future (4R36B, 4R36C ..), there may be differences to the A-model, since it is about movement updates.

✚ Seiko 4R36 versus NH36

Seiko NH36 caliber

They are basically the same mechanism and therefore there is practically no difference between them. The NH36 is nothing more than the version of the 4R36 that Seiko makes for other brands.

As with the Seiko NH35 and 4R35, the NH36 is nothing more than a 4R36 without the Seiko logo and is manufactured by one of its subsidiaries: SII (Seiko Instruments Inc).

model 4R36 NH36
Move Automatically Automatically
Jewellery 24 24
Vibration frequency 21,600 vph 21,600 vph
Energy reserve 40 hours 41 hours
Dimensions 27.40 x 5.32 mm 27.40 x 5.32 mm
precision 35 ~ +45 s / day -20 ~ +40 s / day
Stop seconds And And
Remonte manual And And

The only notable difference between the two is that the NH36 has a better accuracy rating, although in practice it is normal for there not to be a significant difference between one and the other.

Both movements offer the same setting options and can be equally precise in the hands of a good watchmaker.

✚ 4R36 vs 4R35

Seiko 4R35 caliber watch

The main difference between these two movements is that the 4R36 displays the day of the week along with the number representing the day of the month.

Otherwise, they’re exactly the same, although the 4R35 has one less gem that doesn’t affect the rest of the specs at all.

model 4R36 4R35
Move Automatically Automatically
Jewellery 24 23
Vibration frequency 21,600 vph 21,600 vph
Energy reserve 40 hours 40 hours
Dimensions 27.40 x 5.32 mm 27.40 x 5.32 mm
precision 35 ~ +45 s / day 35 ~ +45 s / day
Stop seconds And And
Remonte manual And And

✚ 4R36 against 7S36

Seiko 7S36 caliber watch

The most notable thing between these two mechanisms is that the 7S36 is older and does not have the coveted functions of stop seconds and manual lifting.

This does not necessarily mean that it is worse as the automatic does not require manual winding and stopping the second hand is only relevant for a more precise setting when setting the time.

The Seiko 7S36 has been one of the brand’s most reliable and reputable watch movements for years, but the lack of these basic features makes it a bit dated.

model 4R36 7S36
Move Automatically Automatically
Jewellery 24 23
Vibration frequency 21,600 vph 21,600 vph
Energy reserve 40 hours 41 hours
Dimensions 27.40 x 5.32 mm 27.40 x 4.90 mm
precision 35 ~ +45 s / day -25 ~ +35 s / day
Stop seconds And No
Remonte manual And No

✚ Seiko 4R36 versus 6R15

The Seiko 6R15 is a movement that belongs to a higher segment and is clearly reflected in its technical specifications.Caliber 6r15 Seiko Sumo

On the one hand it has a higher power reserve and on the other hand it moves in a better range of precision according to the manufacturer’s own classification.

Although the 6R15 is also a bit more expensive and can therefore usually be found in Seiko watches at a higher price level than the 4R36.

model 4R36 6R15
Move Automatically Automatically
Jewellery 24 24
Vibration frequency 21,600 vph 21,600 vph
Energy reserve 40 hours 50 hours
Dimensions 27.40 x 5.32 mm 27.40 x 5.25 mm
precision 35 ~ +45 s / day -15 ~ +25 s / day
Stop seconds And And
Remonte manual And And

✚ Seiko 4R36 versus ETA 2824-2

Plans and 2824-2

As can be seen from the table, the ETA 2824-2 is much better in every way, which is normal considering it is a much more expensive Swiss movement.

The main difference is in precision as the 2824-2 has multiple adjustment levels and all are superior to the 4R36. In fact, it can even be customized on stopwatch values ​​and conform to the COSC certificate.

It also moves at 28,800 vph, which means the needle moves faster from second to second, resulting in a smoother movement.

In any case, both are excellent movements that are known and reliable and are each in their price segment.

model 4R36 ETA 2824-2
Move Automatically Automatically
Jewellery 24 25th
Vibration frequency 21,600 vph 28,800 vph
Energy reserve 40 hours 38 hours
Dimensions 27.40 x 5.32 mm 25.6 x 4.6 mm
precision 35 ~ +45 s / day + -12 / + -7 / + -4 sec. Day
Stop seconds And And
Remonte manual And And

✚ Time and date setting

With the crown, you can easily make all time and date settings and wind the mechanism manually.

  • Hour: Pull the crown out (2 clicks), then turn it clockwise or counterclockwise until the hands are in the desired position.
  • Date: Pull out the crown (1 click). Counterclockwise the day of the week and the date change clockwise.
  • Remonte manual: Rotate the crown clockwise without removing it.

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Last update of the links and pictures on 2021-02-03. Prices and availability may differ from the prices published on Amazon.

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