New Full-Set Seiko 5 SportsSSK019 GMT "A.K.A Diet Pepsi" – Made in Japan 42.5mm

🕰 The Watch

Meet the Seiko 5 Sports GMT SSK019, affectionately nicknamed the “Diet Pepsi” by collectors. This is the Japan-assembled version, marked “Made in Japan” on both the dial and the exhibition caseback. While the hang tag reads simply “SSK019,” this is the J variant, carrying the markings enthusiasts look for.

What makes the SSK019 unique is its grey/silver sunburst dial, black/grey bi-color bezel, and the distinctive red/blue 24-hour rehaut (inner GMT ring). It’s a clever twist on Seiko’s Pepsi colorway — subtle on the outside, bold on the inside — hence the nickname “Diet Pepsi.”

This listing is for a brand new, complete full-set (box, hang tag, warranty card, manuals).

✨ Get Noticed

The Diet Pepsi stands out from the rest of the Seiko 5 Sports GMT lineup. The muted bezel and silver dial make it versatile for daily wear, while the inner Pepsi-colored rehaut gives it just the right amount of flair. For collectors, this is the special edition GMT that feels understated at first glance, but reveals its character up close.

🔒 60-Day Defect Replacement Guarantee

Your watch should feel as flawless as it looks. If it arrives defective, or stops working within 60 days of delivery, we’ll replace it. No Hassle.

📋 Specifications

• Model: Seiko 5 Sports GMT SSK019 (Japan Variant)

• Nickname: “Diet Pepsi”

• Case Diameter: 42.5mm

• Lug-to-Lug: 46.0mm

• Case Thickness: 13.6mm

• Movement: Seiko Caliber 4R34, Automatic GMT

• Power Reserve: ~41 hours

• Case Material: Stainless Steel

• Crystal: Hardlex with Magnifier

• Bezel: Bi-directional 24-hour (Black/Grey)

• Dial: Grey/Silver Sunburst, stamped “Made in Japan”

• Rehaut: Red/Blue 24-hour scale (Pepsi rehaut)

• Bracelet: Stainless Steel, 22mm width

• Water Resistance: 100m (10 bar)

• Caseback: Exhibition, see-through, stamped “Made in Japan”

• Lume: Lumibrite on hands and markers

📦 Shipping & Handling

• Fast, insured shipping within the U.S.

• Carefully packaged for protection.

• No signature confirmation required.

🇯🇵 J vs K Breakdown

Seiko produces two international variants of the SSK019: the Japan-assembled version (J) and the overseas-assembled version (K).

• J versions are stamped “Made in Japan” on both dial and caseback.

• K versions are identical in design and movement but lack the markings.

• Collectors typically pay a premium ($50–$100+) for the J variant.

• Both versions are genuine Seiko, built to identical standards.

This listing is for the Japan-assembled SSK019, nicknamed the “Diet Pepsi,” marked Made in Japan.

✅ Buy with Confidence – Register Your New Seiko

I work directly with one of the largest and most reputable Seiko distributors in the business.

But don’t just take my word for it — take Seiko’s.

Every Seiko 5 Sports GMT I sell is 100% authentic and eligible for official Seiko registration. After receiving your watch:

1. Visit Seiko’s registration portal (official site).

2. Enter the model number (on the hang tag).

3. Enter your 6-digit serial number (engraved on the caseback).

4. Enter your 8-character caseback code (e.g., “4R34-0AB0”).

5. Submit your information to receive a confirmation email verifying your registration.

Note: Seiko’s manufacturer warranty applies only to purchases made through authorized dealers. Grey-market purchases are not covered under Seiko’s warranty, but all watches we sell are brand new, authentic, and protected by our 60-day defect replacement guarantee.