Seiko Men’s SRP309 Classic Automatic Dive Watch Reviews

The Seiko Men’s SRP309 Classic Automatic Dive Watch comes up with brand new ideas. However, it may look similar in the Seiko lineup but its unique features make it different apart from the rest. Beyond a lot of variation, orange and black are very popular to the users. Not only the designs are very bold and adventures but its stainless steel bezel, Hardlex crystal protection, LumiBrite material and automatic movement features are very reliable to the users. This adventures timepiece will allow you to dive down up to 660 feet, like Seiko SKX007j1 Witch’s ISO certified water resistance level is 200m. And 200 meter is enough for deep dives.

Instead of all, new orange monster comes with reasonable price compare to its true value Apart from that, it cannot treat as a fashionable or trendy look rather downright tool watch. Moreover the dive watch can used as a complement of watch hand.

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Design – Perfect for  Seiko SRP309 Dive Watch

This dive watch carries an elegant look with its bold design. It’s bold, ruggedness and unique feature makes it perfect for scuba driving. The orange monster’s case size is 43mm that is perfect for any men wrist. Its thickness is 14mm and lug width is 20mm comes with the solid stainless steel bracelet. In short, it is very reliable and comfortable to wear.

Eye-catchy orange dial pattern emphasizes fresh and vivid look to the watch. The bold triangle markers give a very aggressive expression on the dial case. To create lumen brightness in the dark Seiko LumiBrite material is use in both hands and hour markers. Because of the teeth shape hour marker, it is also call “Vampire”.

At present unconditioned rotating bezel, watch with stainless steel seems rare to find. Despite its rugged, the bezel comes with very smooth exterior finishing. Yet, Monster has this unique quality of the better than the conventional dive watch.

In the 3oclock position, it displays the day and date. The luminous intensity also uses here to visible in the dark condition. The Seiko Monster have only one crown to settle down everything like time, date/day change. This versatile crown is located at 4 o’clock position.

The hardlex crystal feature makes this watch extraordinary. It has a high impact on scratch resistance and protects the bezel crystal from concave dive.

As the title suggest, this watch is perfect for diving activities. The idea of designing this watch is best for scuba driving. It has the ability of water resistance up to 200 m.

Automatic Movement    

Among other features, this is slightly different from the first generation Orange Monster. The Seiko SRP 309 is the upgraded version of the legendary SKX 781.  While designs look similar but internally, some technical changes happen.

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In the older Monster feature, include 21jewel Seiko caliber 7S26 automatic movement. This 7S26 venerable movement is non-hacking and self –winding. But, 2nd generation Orange Monster comes with new caliber 4R36. The jewels number increases 21 to 24. Moreover, it has the ability to “hack” or stopwatch in any position and set the time.

The caliber 4R36 updated based on 6R15, which mostly found in Seiko mid-range watches. In 6R15, SPRON510 helps to extend the power up to 50hours. While without the feature of SPRON510, 4R36 can reserve power for 41hours. In 4R36 has high accuracy movement. For this amazing feature quality Seiko brand, become popular to the user.

Certified for True Scuba Diving Watch

From ISO 6425, the Orange Monster gets testimonial for the best scuba diving watch. ISO standard comes with some conditions to get the certificate. After go through all the tests and challenges it gains the title of best. This certificate gives the assurance to take a dive with this watch up to 200m.

Key Features of Seiko Men’s SRP309 Classic Automatic Dive Watch

  • New Orange Monster was import from Japanese brand with new 24 jewels automatic movement.
  • Steel bezel is rotating unconditionally and one versatile crown used for all setting.
  • Orange color dial tone comes with day/date window.
  • The popular LumiBrite use in hands and hours marker to creates luminous intensity.
  • Watchcase thickness is 14mm and diameter is 43mm.
  • The hardlex glass use in the bezel for more crack resistance.
  • ISO certified and proved it can resist water up to 200 m.


  • ISO 6425 certified;
  • Hand winding and high accuracy;
  • Rugged and robust design
  • LumiBrite technology;
  • Update version from the original monster.


  • Does not suit the stylish look;
  • Some people ignore it because of its aggressive dial pattern.

Seiko Men's SRP309

Customer Opinions

Seiko Men’s SRP309 Classic Automatic Dive Watch comes with features and quality. Nevertheless, with the reasonable price, this robust finish watch appear with good mechanical movement. Even so, if you are looking for sporty / travel watch, then this model will appropriate for that.

Customers appreciate highly about this orange monster. Mass amounts of users share their opinion on this dive watch. I found 201 users writes reviews and give 4.5 stars out of 5. Thus, rating gives the essence of how positively people accept the dive watch.

Most of the customers provide positive reviews towards this watch. Yet, some people face difficulties with its accuracy and automatic movement. The same problems do not experience by different people. That is why it does not become a worldwide phenomenon at all.


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In a nutshell, The Seiko SRP309 Orange Monster is an excellent timepiece for any collector. The renowned brand Seiko is able to label this watch as a heavy-duty watch. This amazing dive watch comes with 41 hours backup. Its accuracy and sturdy finish design make it definitely a great value watch.



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