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OMEGA 99's Seamaster PROFESSIONAL 300 Cal.1120

OMEGA 99's Seamaster PROFESSIONAL 300 Cal.1120

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Introducing the Omega Seamaster Professional 300 , made in 1999 .

 Introduced in 1948 , the Seamaster is synonymous with waterproof self-winding watches.

The original Seamaster did not have water pressure resistance notation, and it was only waterproof at the level of daily life waterproofing.

In 1955 , the Seamaster 300 , equipped with a screw back, screw-down crown, and rotating bezel, was launched in pursuit of even higher water resistance, marking the birth of Omega's first diver's watch.

The development of Omega's diver's watch progressed at an accelerated pace due to competition with other companies and cooperation in deep sea exploration, and in 1971 a model with a water resistance of 1,000m appeared.

The Seamaster series, which boasts stable operability even in the harsh environment of the deep sea and has a sophisticated design, is still one of the watches that are highly supported by people around the world.


The Seamaster 300 Professional has a deep blue dial and a wave-inspired design, as befits the Seamaster name.
A full-fledged diver's watch used by professionals, the biggest feature of this watch is the helium escape valve at the 10 o'clock position.

This is a dedicated crown that allows the gas to escape in advance by releasing it in the sea to prevent the helium gas that has accumulated inside the machine from expanding and destroying the machine when surfacing from the deep sea.
Although it is not used on the ground, the presence of this crown gives it a distinctive shape.

In addition, the windshield uses sapphire crystal glass with anti-reflective coating.
It is highly resistant to scratches when hit and does not reflect light easily, so it maintains high visibility both underwater and on the ground.

The glass suppresses reflections, but the waves on the dial catch and reflect the light, so the design is reminiscent of the beauty of the light piercing the surface of the sea.

The installed movement is Cal.1120 . Automatic winding with 23 jewels.

Accuracy is certified because it has passed the chronometer test, which is a proof of high-precision watches.

In addition, it is equipped with a date function, a date fast forward function, and a hack function that stops the second hand, and is made with an emphasis on practicality.
In addition, it is equipped with a soft iron inner cap to enhance anti-magnetic performance.


The size is length: 42,7mm , width: 40,6mm , thickness: 11,5mm .
While other diver's watches tend to be oversized, this one is made in a smaller size and has a lower thickness, making it easier to wear.

The case has minor scratches from use, but the dial is clean and the movement works fine. The click feeling of the bezel is also good.


The Seamaster 300 Professional, which appeared as James Bond's favorite item in the 007 series "Golden Eye" starring Pierce Brosnan.
While it has specs that are used by professional divers, it is also made with particular attention to design.

It has just the right amount of volume when worn, so it goes well with a T -shirt as well as a jacket or shirt style.
It is one that is easy to incorporate into a wide range of outfits.

Product Details
production age 1999s
movement Cal.1120 / 23 jewels / self-winding
case size Length 42.7mm (including lugs) / Width 40.6mm (including crown) / Thickness 11.5mm / Lug width 18mm
case material SS (stainless steel)
accessories Watch body/original case/our store warranty (1 year free warranty)
situation Antique (used)
Waterproof function Non-waterproof
Note *This product will be overhauled after you place your order, so shipping will take about 1-2 months .
Thank you for your understanding.

*The color of the actual product may look slightly different from what you see on your screen. note that.

*This product is also sold at stores. We update the number of items in stock at any time, but it is possible that the item you purchased may be out of stock. Please note that we may cancel the order if there is no scheduled arrival date.

All watches handled by our shop are inspected internally by a professional watch mechanic upon arrival, and are sold only after they have been determined to be genuine, so you can use them with confidence.

When you purchase a watch, we will deliver it with a new leather strap.
Please select the desired color from the order selection tab and place an order.
*For genuine watch belts and products with metal bands, the leather belt will not be attached and will be sent separately as a spare.
In addition, we will also send you a special case for the watch at the time of shipment.

●Guidance after purchasing an antique watch, please be sure to check the contents●

At Amboy, when we sell antique watches, we don't hand them over to you immediately after you place an order. (Period is about 1-2 months)

Watches are completely disassembled by a watch repair technician qualified as a first-class watch repairer, replaced with consumable parts such as internal packing, cleaned, and lubricated.
In addition, we will also send you our own OH certificate, what kind of work was done at the time of delivery, and a photo of the machine when it was disassembled and maintained.

Of course, since the product itself is a second-hand product, there is no guarantee that it will never break, but we have taken this measure so that you can enjoy the original performance of the watch and use it with peace of mind in the future. , Thank you for your understanding.

At the time of product purchase, we offer a one-year warranty period depending on the model. Even if the period has passed, we will charge a fee, but we will properly accept repairs. If you do not have a repair shop near you, please feel free to contact us.

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