OMEGA Seamaster Diver 300M Calibre 2500/2507 User Manual | Adjustments
- June 13, 2024
- Omega
Table of Contents
OMEGA Seamaster Diver 300M Calibre 2500/2507 User Manual | Adjustments
INTRODUCTION
One of the most well-known and widely worn luxury diving timepieces in the world is the OMEGA Seamaster Diver 300M, more commonly referred to as simply the “Seamaster.” Introduced in 1993, it quickly gained fame not only for its build quality and design but also due to its association with the James Bond film franchise, starting from the 1995 movie “GoldenEye.”
ADDITIONAL INFORMATION
Origins
OMEGA first presented the Calibre 2500 to the public in the latter half of the
1990s. It is significant because it was the first movement ever produced by
OMEGA to incorporate the game-changing co-axial escapement, which had been
created in collaboration with the illustrious watchmaker George Daniels. The
co-axial escapement is known for reducing friction between the components,
leading to greater long-term accuracy and reduced service intervals.
Versions
Ever since it was first released, the Calibre 2500 has gone through a number
of iterations, each of which has been designated with a letter (A, B, C, and
D), and each one has brought improvements and alterations to the movement.
Calibre 2507
This is a special variant of the Calibre 2500 and is commonly referred to as
the “James Bond” caliber since it was used in select James Bond special
edition watches. The reason for this is that it was used in the watches that
were released to commemorate the 50th anniversary of the James Bond film. The
principal distinction is primarily one of appearance, with the rotor of the
movement being adorned with a “bullet” pattern to match the James Bond
concept. This is the primary difference.
FEATURES
The Seamaster Diver 300M with Calibre 2500/2507 comes with the following features:
-
Water Resistance:
As the name implies, the watch is water-resistant up to 300 meters, making it suitable for diving and other water activities. -
Helium Escape Valve:
This valve, which is a hallmark feature of the Seamaster Diver 300M, allows helium atoms to escape during decompression. This is a feature that professional divers will find handy. -
Design:
The dial of the watch is normally either blue or black, and it contains wave patterns, skeletonized hands, and affixed indexes that are filled with luminescent material. -
Bezel:
A revolving bezel with a unidirectional rotation is necessary for divers to keep track of the duration of their dives. -
Bracelet/Strap:
Most models come with either a metal bracelet or a rubber strap, both of which are designed for comfort and durability. -
Caseback:
The recognizable Seamaster brand name is frequently displayed on the case back.
SYMBOLS
Ceramic bezel
Co-Axial escapement
Automatic
Chronometer
Sapphire crystal
An anti-reflective treatment on both sides
Screw-in crown
Helium escape valve
Water-resistant to a relative pressure of 30 bar (300 meters/1000 feet)
WATCH FUNCTIONS
The crown has 3 positions
-
Normal position (wearing position): when the crown is positioned against the case, the crown ensures that the watch is water-resistant.Occasional winding: if the watch has not been worn for 48 hours or more, wind it up with the crown in position 1.
-
Correcting the date: pull the crown out to position 2, turn the crown backward, then push the crown back to position 1.
NB: date-setting is not recommended between 8 pm and 2 am. -
Time setting: hours – minutes – seconds. Pull the crown out to position 3. The second hand will stop. Turn the crown forward or backward. Synchronize the seconds by pushing the crown back to position 1 to coincide with a given time signal.
HELIUM ESCAPE VALVE
How to use the helium escape valve? (fig. 2)
In its normal position (fig. 2.1), the OMEGA helium escape valve is perfectly
watertight thanks to the gaskets (B), but it is not functional, since it is
screwed down During the decompression phase, unscrew the crown of the valve in
order to release the mechanism (fig. 2.2). The valve is now watertight from
the outside. As the interior pressure becomes greater than the exterior
pressure, it pushes the gasket (A) out of its seating, thus releasing the gas
(fig. 2.3). Once the pressure is equalized, gasket (A) returns to its original
position, pushed by the spring (C) (fig. 2.2).
This operation is automatically repeated several times during the
decompression phase. Once atmospheric pressure is reached, screw down the
crown of the valve(fig. 2.1).
Note: Even if the valve is unscrewed, we strongly recommend that the
valve remains screwed down whenever the watch is immersed in water, the watch
is still water-resistant to a relative pressure of 5 Bar (50 meters). However,
complete water resistance to the dial depth can only be achieved with gasket
(B) and the valve in the screwed down position.
FAQs
What is the significance of the co-axial escapement in the Calibre 2500/2507?
The co-axial escapement, developed by George Daniels and adopted by OMEGA, reduces friction between components, enhancing long-term accuracy and requiring less frequent servicing compared to traditional escapements.
How often should the Seamaster Diver 300M be serviced?
While the co-axial movement has longer service intervals than many traditional movements, it's generally recommended to service the watch every 5-8 years. However, it's always a good idea to have the watch checked annually for water resistance
Is the Seamaster Diver 300M suitable for professional diving?
Yes, with a water resistance of up to 300 meters and a helium escape valve, it's suitable for both recreational and professional diving.
What's the difference between the Calibre 2500 and 2507?
Can I manually wind the Calibre 2500/2507?
Yes, the movement can be manually wound. To do so, unscrew the crown to the first position and turn it clockwise.
How do I operate the helium escape valve?
The helium escape valve is usually set to operate automatically. However, some models might require manual operation by unscrewing the valve, usually before decompression begins.
Is the wave pattern on the dial the same for all Seamaster Diver 300M models?
No, the wave pattern has seen variations over the years. Some models don't feature the wave pattern at all, while others might have a different design.
Can I change the strap or bracelet on my Seamaster Diver 300M?
Yes, OMEGA offers a variety of straps and bracelets. It's recommended to have strap changes done by authorized service centers to ensure the watch remains water-resistant.
Is the lume on the watch radioactive?
No, OMEGA uses Super-LumiNova, a non-radioactive luminescent material.
How accurate is the Calibre 2500/2507?
While individual performance can vary, many users report accuracy within COSC chronometer standards, which is -4/+6 seconds per day.
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