Seiko Orange Monster

Seiko Orange Monster Men’s Automatic Diving Watch SRP309 Review


Seiko Orange Monster Watch Review Summary

My rating: 8.5/10. Seiko Orange Monster watch. 24 jewel automatic diving timepiece.

Hello, today I’m doing a Seiko Orange Monster review. The Seiko Orange Monster is a very well known quality watch that features this prominent orange dial. It runs on a very high quality automatic movement and has a diver’s 200m water resistance rating. If you love diving watches you should give my Steinhart Ocean 1 review a read next.

I hope you enjoy this Seiko Orange Monster review below.

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Seiko Orange Monster

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At the bottom of this article, you can find a list of my recommended retailers to purchase this watch from

Seiko Orange Monster Watch Review

Seiko Orange Monster Dial & Case Design

A key feature of this Seiko dive watch is the vibrant orange dial that’s made it an instantly recognisable hit. The 2nd generation Orange Monster has a clear easy to read display with these bold hour markers and hands which are typical of diving watches. The hands and hour markers are coated in a good amount of lume to make them extra easy to read in dim lit conditions. There’s a day and date display located at the 3 o’clock position too.

The casing of the Orange Monster is made of a strong stainless steel with a screw down crown located at the 4 o’clock position. There’s a uni-directional rotating bezel with minute numbering featured on it.

Seiko Orange Monster Type Of Crystal

The Seiko Orange Monster features a Hardlex crystal glass that’s commonly found on many Seiko timepieces. This is a durable crystal that’s stronger than mineral glass but weaker than sapphire. It offers a good level of protection from scratches and knocks.

Seiko Orange Monster Watch Movement

Powering the Seiko Monster is a 4R36 caliber automatic 24 jewel movement. This automatic movement has a 41 hour power reserve and beats at 21,600 BPH giving it a nice smooth 6 ticks per second. The movement features both manual winding and hacking. You can learn all about this in my Seiko 4R36 movement review.

Seiko Monster Watch Size

The casing of the Seiko Monster measures 42mm in diameter, not including the crown. The thickness of the casing comes it at approximately 12mm. This is a large-medium sized watch that’s a popular size for diving timepieces.

Seiko SRP309 Strap

The strap of the Seiko Orange Monster is made of a strong stainless steel and measures 20mm in width. It fastens with a fold over style clasp that includes a safety catch. The strap can be replaced if you decide that’s something you would like to do.

Seiko Monster Water Resistance Rating

The Seiko Orange Monster has a very good water resistance rating, as you’d expect from a high quality Seiko diving watch. A Diver’s 200m or 20 bar rating makes this watch suitable for scuba diving at depths not suitable for saturation diving.

Seiko Orange Monster Watch Specifications

  • Band: Stainless steel strap, standard length, 20mm width, fold over style clasp.
  • Case: Stainless steel casing, sizing diameter: 42mm and thickness: 12mm.
  • Dial: Analogue display. Hardlex glass window lens.
  • Movement: 4R36 Automatic movement.
  • Water Resistant: A water resistance of up to Diver’s 200m / 20 bar.

Seiko Monster Watch Advantages

  1. Luminous hands
  2. Popular 4R36 automatic movement
  3. Day & date display
  4. Hardlex crystal
  5. Diver’s 200m water resistance rating

Seiko Monster Watch Disadvantages 

  1. The watch has a large 42mm diameter which may not be suitable for people with smaller wrists

My Final Thoughts On This Seiko Monster Review:

It’s well worth checking out my 14 Best Seiko 5 watches where you can take a look at many of the top timepieces from Seiko.

Overall it’s pretty easy to see why this model has been such a popular hit for Seiko dive watch enthusiasts. It’s a great watch with a very high build quality. The diver’s 200m water resistance rating makes it ideal for most diver’s needs too.

After looking into the watch design, quality, features, and pricing this watch received a 8.5/10 from us at The Watch Blog.

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Where to buy the Seiko Monster

I like to stick to listing retailers that I’ve actually had experience buying from in the past. Below I’ve listed some of the top places to buy this watch from, check all for the best price. Variations of this watch include: Seiko SRP309J1, the original Seiko Orange Monster is the Seiko SKX781.

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