The authenticity of the watch has been checked and certified by Sebastian, who is one of Sweden's leading watch experts.

This 1998 Omega Seamaster Diver 300M 36mm is a refined choice for everyday wear, the office or weekend outings. In very good condition with light traces of use, it features a stainless steel case and bracelet, a dark blue wave dial and date window at 3 o’clock. Presented as a full set, it brings sporty vintage Omega style to any occasion.

Q: What size is this Omega Seamaster, and how does it wear?
A: This is the mid-size version of the Seamaster Diver 300M, listed here at approximately 35 mm. It is a great option for slimmer wrists or for anyone who prefers a more compact, classic dive-watch look. This piece is currently sized to fit a wrist up to approximately 17 cm and comes with 2.5 extra links.

Q: Is this watch quartz or automatic?
A: This reference uses a quartz movement, so it is battery-powered rather than self-winding. Many buyers like quartz Seamasters for their everyday accuracy, convenience, and lower day-to-day upkeep.

Q: How often does the battery need changing, and how will I know when it is low?
A: Quartz Omega movements typically need a battery change every few years. This movement also has an end-of-battery-life indicator, so if the seconds hand starts jumping in 4-second intervals, it is usually time to have the battery replaced.

Q: Can I swim or dive with this watch?
A: The Seamaster Diver 300M family was originally designed as a professional dive watch. However, with any vintage or pre-owned watch, actual water resistance depends on the current condition of the seals and whether the watch has been pressure-tested recently. For that reason, we recommend caution around water unless it has been checked after purchase.

Q: What is the helium-release valve for?
A: The valve at 10 o’clock is designed to let trapped helium escape during saturation diving. Most owners will never need to use it in everyday life, but it is part of the Seamaster’s iconic professional dive-watch design.

Q: What does “full set” mean for this watch?
A: This watch is listed as a full set and includes the box. In pre-owned watch terminology, “full set” usually means the watch comes with its original presentation items and documentation for its era. For the exact contents included with this specific piece, please refer to the product information on this page or contact us for a detailed rundown.

Q: What condition is this watch in?
A: It is listed in very good overall condition with light traces of use. The case and bracelet show scratches consistent with age and wear, while the internal condition is noted as very good.

Q: How should I care for a vintage Seamaster like this?
A: Wipe it gently with a soft cloth, avoid hard knocks, and make sure the crown is properly secured. For long-term reliability, it is a good idea to have the battery, seals, and overall function checked periodically by a qualified watch specialist, especially if you plan to wear it regularly.

Q: What size is this Omega Seamaster, and how does it wear?
A: This is the mid-size version of the Seamaster Diver 300M, listed here at approximately 35 mm. It is a great option for slimmer wrists or for anyone who prefers a more compact, classic dive-watch look. This piece is currently sized to fit a wrist up to approximately 17 cm and comes with 2.5 extra links.

Q: Is this watch quartz or automatic?
A: This reference uses a quartz movement, so it is battery-powered rather than self-winding. Many buyers like quartz Seamasters for their everyday accuracy, convenience, and lower day-to-day upkeep.

Q: How often does the battery need changing, and how will I know when it is low?
A: Quartz Omega movements typically need a battery change every few years. This movement also has an end-of-battery-life indicator, so if the seconds hand starts jumping in 4-second intervals, it is usually time to have the battery replaced.

Q: Can I swim or dive with this watch?
A: The Seamaster Diver 300M family was originally designed as a professional dive watch. However, with any vintage or pre-owned watch, actual water resistance depends on the current condition of the seals and whether the watch has been pressure-tested recently. For that reason, we recommend caution around water unless it has been checked after purchase.

Q: What is the helium-release valve for?
A: The valve at 10 o’clock is designed to let trapped helium escape during saturation diving. Most owners will never need to use it in everyday life, but it is part of the Seamaster’s iconic professional dive-watch design.

Q: What does “full set” mean for this watch?
A: This watch is listed as a full set and includes the box. In pre-owned watch terminology, “full set” usually means the watch comes with its original presentation items and documentation for its era. For the exact contents included with this specific piece, please refer to the product information on this page or contact us for a detailed rundown.

Q: What condition is this watch in?
A: It is listed in very good overall condition with light traces of use. The case and bracelet show scratches consistent with age and wear, while the internal condition is noted as very good.

Q: How should I care for a vintage Seamaster like this?
A: Wipe it gently with a soft cloth, avoid hard knocks, and make sure the crown is properly secured. For long-term reliability, it is a good idea to have the battery, seals, and overall function checked periodically by a qualified watch specialist, especially if you plan to wear it regularly.