Rotary Seamatic 100 GMT - Black - 40mm

Name: Rotary Seamatic 100 GMT - Black - 40mm
Brand: Rotary
SKU: udut3ltzma
Availability: InStock

The Rotary Seamatic 100 GMT brings practical travel functionality to a clean, everyday sports desi...

Best current price£289.00from Debenhams

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Rotary Men's Silver Rgb10037-04 Seamatic 40Mm Automatic Watch In

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F.Hinds JewellersRotary Men's Stainless Steel 316L Black Seamatic 100 Gmt Automatic Bracelet Watch - W13315 Rgb10037/04

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Product Information

Full details

The Rotary Seamatic 100 GMT is designed for travelers and watch enthusiasts who need a reliable, professional-looking timepiece that handles multiple time zones with ease. Its key strength lies in its blend of a robust 40mm stainless steel build with the practical utility of an automatic GMT movement, offering both style and substance for daily wear. While it is an excellent everyday watch, users should note that the GMT hand functionality requires manual adjustment via the crown, which may be less intuitive than digital time zone tracking for some.

All features

Colour	Black
Dial Size	40mm
Series	Seamatic 100 GMT
Model Part Number	68B211-ONESIZE
Brand	Rotary

Extended Product Information

FAQs

Does this watch need a battery?

No, this is an automatic watch powered by your movement.

Can I wear this watch while swimming?

Yes, it features 100m water resistance, which is suitable for swimming and recreational water sports.

What is the lug width for straps?

The watch features standard lugs, allowing for a variety of aftermarket strap replacements.

How do I adjust the bracelet?

The bracelet includes removable links; it is recommended to visit a jeweler to ensure a proper, non-damaging fit.

Is the GMT hand independent?

The GMT hand is adjusted via the crown to represent a second time zone relative to the main time.

What material is the crystal made of?

It uses sapphire glass, which is highly resistant to scratches.

Troubleshooting

Watch has stopped running

Manually wind the crown clockwise 20-30 times to build up the power reserve.

Date is changing at noon instead of midnight

Advance the time forward by 12 hours to synchronize the date change with the midnight cycle.

GMT hand is misaligned

Ensure the crown is pulled to the correct position for GMT adjustment; check if the hand was set while the movement was in a delicate gear phase.

Pros and Cons

Pros

Versatile 40mm case size suits most wrists
Reliable NH34 automatic movement
Scratch-resistant sapphire crystal
Water-resistant up to 100 meters
Includes dedicated GMT hand for dual time tracking

Cons

No quick-set GMT hand independent of local time
Fixed stainless steel bezel
Lacks a screw-down crown for deeper diving activities

Setup, Compatibility & Care

To set the time on your Seamatic, pull the crown to the second position to adjust the hour and minute hands. To adjust the GMT hand and date, use the first crown position. As an automatic watch, it winds via the natural movement of your wrist; if the watch has stopped, gently shake it or wind the crown manually 20-30 times. For care, rinse the stainless steel case and bracelet with fresh water after exposure to saltwater or sweat to prevent residue buildup. Store the watch away from strong magnetic fields to maintain movement accuracy. We recommend a professional service every 3-5 years to ensure the oil and seals remain in peak condition.