Unleash your creativity with the RC1648 GMT Alpinist Style Case, a versatile and premium choice for watch modding enthusiasts. Designed to accommodate the Seiko NH34 GMT Movement, this case delivers both functionality and style for your custom builds.

  • Case Dimensions: Features a 41.3mm diameter without the crown (43.2mm with crown) and a lug-to-lug size of 46.4mm, providing a balanced wrist presence.
  • Thickness: Overall thickness is 12.5mm with the solid case back or 12.7mm when using the slim sapphire case cover.
  • Dial Compatibility: Fits 28.5mm dials, giving you flexibility for a wide range of design options.
  • Premium Materials: Constructed from durable 316L stainless steel with a brushed finish, this case combines durability with a sleek look.
  • Pre-installed Features: Comes with pre-installed sapphire glass and a crown for a seamless modding experience.
  • Functional Details: The bi-directional secondary crown controls the inner compass, represented by a striking white chapter ring. The engraved GMT bezel adds both functionality and a touch of sophistication.
  • Lug Specifications: With a 20mm lug width, it pairs effortlessly with a variety of strap styles to complete your build.

Whether you're building a unique GMT watch or enhancing your collection, the RC1648 GMT Alpinist Style Case with its polished steel design and white chapter ring delivers elegance and utility in perfect harmony.

Here's the available matching bracelet for the case:

  • SB1244 Seiko Alpinist (SARB017) Jubilee Bracelet - Steel
  • SB1245O Seiko Alpinist (SARB017) Oyster Bracelet - Steel
  • SB1245P Seiko Alpinist (SARB017) President Bracelet - Steel

Crown Measurements: Diameter: 5.9mm, Thickness: 3.7mm


Package Includes:
1. Brushed top and brushed side steel case
2. Pre-installed flat sapphire crystal
3.  Sterile crown with 1pc stem for NH Movement
4. 20mm Spring bar

📦 Shipping, Duties & Customer Care Information

✅ Are tariffs and import duties included?

Yes.
For U.S. customers, all tariffs, import duties, and related charges are already included in the sale price.

Orders are shipped under Delivered Duties Paid (DDP) terms, so there are no additional charges upon delivery.
What you pay at checkout is final.

🚚 How long does shipping take?

We currently ship via Economy Shipping.

  • Estimated delivery time: 3–4 weeks

  • Delivery times may vary slightly depending on destination and customs processing.

At the moment, Express shipping is not available.

✈️ When will my order be shipped?

Orders are carefully prepared and dispatched within 1–3 business days after payment confirmation.

Once a tracking number is provided, your parcel has already been shipped.

🔍 Will I receive a tracking number?

Yes. Tracking details will be shared once available.

Please allow a few days for tracking updates to appear, as initial scans may take time. Rest assured, we continue to monitor shipments to ensure they are moving as expected.

🇺🇸 Special Note for U.S. Buyers

✔ Duties and tariffs included
✔ No customs or brokerage fees
✔ No surprise charges upon delivery

Our goal is to make your purchase smooth, transparent, and worry-free.

🛠️ Our Commitment to You

We take full responsibility for your order and are committed to ensuring it arrives safely.

  • If you receive a damaged or incorrect item, please contact us immediately so we can assist you.

  • We are happy to answer any questions regarding installation, compatibility, or product use.

  • We’ll support you every step of the way — from shipping to proper installation.

🔄 Refunds & Returns

  • If you receive any defective or missing items, please message us immediately. We will review the issue and resolve it accordingly.

  • Order cancellations:

    • If the order has not yet been shipped, we will cancel it and process the refund.

    • If the order has already been shipped, the item must be returned to us before a refund can be processed.

  • Please note that items damaged during installation are not eligible for replacement or refund. We strongly recommend reviewing installation instructions carefully or seeking professional assistance if needed.

💬 Need Help?

If you have any questions, concerns, or need clarification about our products, shipping, or installation, please don’t hesitate to message us.

We truly appreciate your trust and look forward to serving you again.