The Omega Seamaster, a name synonymous with diving prowess and elegant design, often features a distinctive element: the helium escape valve (HEV). This seemingly small detail plays a crucial role in the watch's functionality, particularly for professional saturation divers, and significantly impacts its value and desirability on the pre-owned market. This article will explore the function of the helium escape valve in Omega Seamaster watches, its relevance to different models, and how it affects the price and overall value of these iconic timepieces.
Understanding the Helium Escape Valve (HEV)
The HEV, often found on professional diving watches, is a manual valve designed to release helium gas that can build up inside the watch case during saturation diving. Saturation diving involves spending extended periods (often weeks) at significant depths. During these dives, divers live in pressurized chambers, and the helium used in the breathing mixture can permeate the watch's seals. If this helium is not released during ascent, the pressure differential could cause the crystal or caseback to pop off, rendering the watch unusable.
The HEV on a Seamaster is a manual valve, typically located on the left side of the case. To operate it, the diver screws it down to ensure watertightness before the dive. After the dive, as the diver ascends and the external pressure decreases, the valve is carefully loosened to allow the helium to escape slowly and prevent damage to the watch. The process is simple but crucial for the longevity and functionality of the watch in extreme diving conditions.
The statement "Screw it down to be watertight, slacken when you're coming back up from your 2 week tour on the seabed" perfectly encapsulates the valve's function. However, improper use or damage to the HEV can significantly impact the watch's water resistance and overall value. The suggestion that "the previous owner damaged it" highlights a common issue with pre-owned Seamasters equipped with HEVs. Damage can range from minor scratches to complete malfunction, significantly affecting the watch's functionality and its resale value.
Omega Seamaster Models and the HEV
The presence and type of HEV vary across different Omega Seamaster models. While not all Seamasters feature a helium escape valve, its inclusion is a strong indicator of the watch's professional diving capabilities and often commands a higher price. Older models, particularly those designed for professional divers, are more likely to incorporate the HEV, while newer models, catering to a broader market, might omit this feature. Understanding the model's history and specifications is crucial in determining the presence and condition of the HEV.
Omega Seamaster Unisex Models and the HEV
The inclusion of an HEV is not exclusive to men's Seamaster models. Several unisex Omega Seamaster models also incorporate this feature, reflecting the brand's commitment to producing high-performance watches suitable for a wider range of users. However, the prevalence of HEVs in unisex models might be lower compared to their professional diving counterparts. Potential buyers of unisex Seamasters should carefully examine the specifications to determine the presence of the HEV and its condition.
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