Welcome to your Maystone Prosperity GMT.

This page provides all the essential information about your new watch, including specifications, setting instructions, warranty details, and more.

Contents

Watch Specifications

  • Case Diameter: 38mm

  • Case Thickness: 11.5mm

  • Lug-to-Lug Length: 46mm

  • Lug Width: 20mm

  • Movement: Seiko NH34 Automatic GMT

  • Crystal: Sapphire with Anti-Reflective Coating

  • Bracelet: Solid Stainless Steel with Quick Release and On-the-Fly Micro Adjustment

  • Water Resistance: 100 meters (10 ATM)

  • Dial Features: Talon-Inspired Indices, Eagle-Owl Orange GMT Hand, Maystone "M" Seconds Hand

  • Caseback: Engraved with Maystone Wingspan Logo

How to Set Your Watch

Please refer to the video below for a visual guide on setting your Maystone Prosperity GMT.

Step-by-Step Guide

  1. Winding the Watch:

    • Unscrew the crown counterclockwise until it pops out to the first position.

    • Turn the crown clockwise approximately 20-30 times to wind the mainspring.

  2. Setting the Time:

    • Pull the crown out to the second position.

    • Rotate the crown to set the desired time.

  3. Setting the Date:

    • Push the crown back to the first position.

    • Turn the crown clockwise to adjust the date.

    • Note: Avoid setting the date between 9 PM and 3 AM to prevent damage to the movement.

  4. Setting the GMT Hand:

    • Pull the crown to the first position.

    • Turn the crown counterclockwise to set the GMT hand to your desired second time zone.

  5. Securing the Crown:

    • Push the crown back in and screw it clockwise to ensure water resistance.

How to Adjust Your Bracelet

What you'll need:

  1. A small precision screwdriver

  2. A clean, well-lit workspace

  3. A soft cloth or watch mat to protect your watch

Step-by-step instructions:

  1. Lay your watch face-down on a soft cloth to avoid scratches.

  2. Examine the side of the bracelet links — you’ll see small screw heads on one side of each removable link.

  3. Identify the links to remove:

    • Start by estimating how many links you need to remove for a comfortable fit.

    • It’s best to remove an equal number of links from each side of the clasp to keep it centered.

  4. Insert the screwdriver into the screw head of the first link you want to remove.

  5. Turn counter-clockwise (left) to carefully unscrew the pin.

    • Hold the bracelet firmly and go slowly — screws can be tight from factory assembly.

    • Unscrew the pin fully and set it aside safely.

  6. Repeat on the second link (if removing multiple links) using the same method.

  7. Reattach the bracelet ends:

    • Align the links you want to rejoin.

    • Insert the screw back through the holes.

    • Tighten by turning clockwise (right) until the screw is snug.

    • Do not overtighten, as this could strip the screw thread.

  8. Test the fit on your wrist.

    • If still loose or tight, repeat steps above to adjust by another link or two.

Quick tips:

  1. Sometimes, screwing the pins back in can feel a little stiff. This is usually because the pin isn’t perfectly aligned through the link holes. A helpful trick is to let gravity do the work for you: lay the watch head flat on a soft cloth, then hold the bracelet vertically so the links naturally fall into alignment. You can refer to the photo to see the position we recommend.

  2. After resizing, double-check that all visible screws are tightened to avoid them coming loose during wear.

How to Use the Micro-adjustment

Open the clasp fully so you can access the inside of the buckle.

  1. Locate the small metal bar in the centre of the buckle — this is the adjustment bar.

  2. Gently push or shift the bar to the side — this unlocks the sliding mechanism.

    • Tip: It only needs a small nudge to disengage — no tools required.

  3. While the bar is shifted, slide the bracelet link forward or backward along the track inside the clasp to your desired fit.

    • Moving it inward tightens the bracelet.

    • Moving it outward loosens the bracelet.

  4. Release the bar to lock it back into place.

  5. Close the clasp and try on the watch to check the fit.

    • Repeat the steps if further adjustment is needed.

Warranty Information

Your Maystone Prosperity GMT comes with a 12 month warranty covering manufacturing defects.

Warranty Coverage:

  • Manufacturing defects in materials and workmanship.

Warranty Exclusions:

  • Damage resulting from improper use, accidents, or unauthorized repairs.

  • Tampering or disassembly by unauthorized third parties.

Claim Process:

14-Day Return Policy

If you’ve changed your mind, you can return your unworn watch within 14 days of delivery for a full refund or exchange.

To be eligible for a return:

  • The watch must be unused, unworn, and in original condition

  • Proof of purchase is required (order confirmation or receipt)

Please note: We do not accept returns for items that show signs of wear, damage, or adjustment (such as strap resizing or removal of bracelet links).

How to Start a Return

To initiate a return, please email us at Info@maystonewatches.com with your order number and reason for return. We’ll get back to you as soon as possible with instructions.

Please do not send your watch back without contacting us first.

Refunds

Once your return has been received and inspected, we’ll issue a refund to your original payment method.

Return Shipping

Customers are responsible for the cost of return shipping unless the item is faulty. We recommend using a tracked and insured service, as we cannot take responsibility for items lost or damaged in transit.

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