Omega Seamaster 300M 36mm Quartz 1993 Watch

Q: What is the Omega Seamaster 300M 36mm Quartz (1993)?
A: It’s a Swiss‑made, mid‑size stainless‑steel dive watch from Omega’s iconic Seamaster Professional line, featuring a 36mm case, blue wave dial with luminous markers, a unidirectional rotating bezel, and a quartz movement. This example is vintage from 1993 and carries the classic 300M design language.

Q: Which movement does it use and what battery does it take?
A: Most Seamaster 300M quartz models from this era are powered by the Omega calibre 1538. Battery type for this calibre is commonly a 1.55V silver‑oxide cell such as Renata 371 (SR920SW), with typical battery life around 2–4 years. As tolerances can vary, we recommend a professional watchmaker confirms the exact battery for this specific piece.

Q: How do I set the time and date and use the crown safely?
A: Unscrew the crown anti‑clockwise to release it. Position 1: quickset the date. Position 2: set the time. Avoid changing the date between roughly 8pm and 2am to protect the mechanism. When finished, push the crown in fully and screw it down snugly. Being quartz, the watch does not need winding.

Q: Is it water‑resistant and can I swim with it?
A: The Seamaster 300M was originally rated to 300 metres. However, water resistance on vintage watches cannot be guaranteed without recent gasket replacement and pressure testing. We recommend avoiding swimming, showering or submersion unless the seals have been renewed and the watch has been professionally pressure‑tested. Always keep the crown (and helium valve, if present) securely screwed down.

Q: What does the helium escape valve do and should I use it?
A: The helium escape valve is designed for professional saturation diving to release helium that may accumulate inside the case. For everyday wear, you do not need to use it—keep it screwed closed at all times and never operate it underwater.

Q: What crystal and bezel materials does this model have?
A: The Seamaster 300M of this era typically features a scratch‑resistant sapphire crystal and an aluminium bezel insert. Aluminium bezels can show fade over time, which many collectors appreciate as vintage character. Clean the watch with a soft, dry microfibre cloth and avoid abrasive cleaners or solvents.

Q: How accurate is the quartz movement and what service interval is recommended?
A: Quality Swiss quartz movements are very accurate, often within seconds per month, depending on temperature and usage. Replace the battery every 2–4 years or when the low‑battery indicator appears. For longevity and moisture protection, have the gaskets checked and the watch pressure‑tested periodically; a routine service every 5–10 years is a sensible guideline.

Q: How will I know when the battery needs replacing?
A: Omega’s quartz calibre typically features an end‑of‑life (EOL) indicator: the seconds hand will jump in 4‑second intervals. The watch may continue running for a short period, but the battery should be replaced promptly by an authorised watchmaker.

Q: Will the bracelet fit my wrist, and can it be resized or swapped for a strap?
A: This watch fits a wrist up to approximately 20.5cm as listed. We can size the bracelet before dispatch, and additional links may be sourced subject to availability. If you prefer a strap, we’re happy to advise on compatible options and correct lug width for this reference.

Q: What is included, and how do you guarantee authenticity and after‑sales support?
A: This listing is delivered with a box (see the Accessories section for details). A Retro Tale professionally authenticates every item and offers a 12‑month movement warranty, free insured DHL shipping, a 14‑day return policy, and 0% customs fees for EU buyers. On request, we can help confirm movement, reference and serial details for your peace of mind.