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Product details
Description
The Seiko Prospex Marine Green GMT Automatic Men's Watch SPB381J1 is a premium professional diver's timepiece that combines Seiko's renowned diving expertise with practical GMT functionality for modern explorers. Distinguished by its striking marine green dial and matching ceramic bezel insert, this robust watch is powered by the in-house Calibre 6R54 automatic movement with manual winding capability, delivering an impressive 72-hour power reserve and an independently adjustable 24-hour GMT hand for tracking a second time zone. Crafted from stainless steel and protected by a scratch-resistant sapphire crystal with anti-reflective coating, the SPB381J1 offers outstanding durability both on land and underwater. With 200-metre diver's water resistance, LumiBrite-enhanced visibility, and a secure diver's extension clasp, this Prospex GMT is built for adventure while maintaining exceptional Japanese craftsmanship and timeless style.
Case & crystal7
Case Size
42.0 mm Diameter × 12.9 mm Thickness × 48.6 mm Lug-to-Lug
Lug Width
20 mm
Case Material
Stainless Steel
Case Shape
Round
Glass
Sapphire Crystal
Crystal Coating
Anti-Reflective Coating on Inner Surface
Case Back
Screw Case Back
Movement3
Watch Type
Automatic GMT Diver's Watch
Movement
Automatic with Manual Winding (Calibre 6R54)
Functions
24-Hour GMT Hand (Dual Time Display), Stop Seconds Hand Function
Dial2
Dial Colour
Marine Green
Luminosity
LumiBrite on Hands, Indexes and Bezel
Strap & clasp3
Band Material
Stainless Steel
Band Colour
Silver
Clasp
Three-Fold Clasp with Secure Lock, Push Button Release and Diver's Extender
General16
Brand
Seiko
Model Number
SPB381J1
Collection
Prospex
Edition
Marine Green GMT
Accuracy
+25 / -15 Seconds Per Day
Power Reserve
Approximately 72 Hours (3 Days)
Jewels
24 Jewels
Bezel
Unidirectional Rotating Stainless Steel Bezel with Green Ceramic Insert
Display
Analog GMT
Crown
Screw-Down Crown
Water Resistance
200 Metres / 660 ft Diver's (20 Bar)
Magnetic Resistance
4,800 A/m
Weight
176 g
Special Features
Marine Green Dial, Calibre 6R54 Automatic GMT Movement, 72-Hour Power Reserve, Green Ceramic Bezel, Sapphire Crystal, Diver's Extension Clasp, Professional Diving Specifications
Gender
Men
Warranty
2 Years Warranty
Highlighted points
Case size: 42 mm
Movement: Automatic
Case Material: Stainless Steel
Case Shape: Round
Dial Color: Green
Water Resistent: 200m
Everything You Need to Know
Are the watches sold on Ramesh Watch Co genuine?
Yes. Ramesh Watch Co has been in watch retail since 1948 and is an authorised retailer for brands like Rado, Tissot and Seiko. We also sell Casio, Fossil, Armani Exchange, Emporio Armani, Michael Kors and many more. Every watch is 100% original and comes in the brand's original box with its warranty card.
Do the watches come with a warranty?
Yes. Every watch is covered by its brand's official warranty, and the warranty card is included in the box. If a functional or manufacturing issue comes up, we help you get it repaired or replaced through the brand's warranty.
Can I return or exchange my watch?
Yes, within these time limits:
Change of mind (you don't like the look or size): request a return within 48 hours of delivery.
Functional or manufacturing issue: request a return within 10 days of delivery.
The watch must be unused and returned with its original box, warranty card, tags and all accessories. Smartwatches cannot be returned for change of mind; issues with them are handled under the brand warranty.
How long does a refund take?
Once we receive the watch, we inspect it within 24–48 hours. After approval, we start the refund within 48 hours. The amount usually reaches your account in 5–10 working days.
Online payments (UPI, card, net banking) are refunded to the same payment method.
COD orders are refunded to your bank account by NEFT/IMPS.
A return shipping fee applies: ₹200 on orders below ₹10,000, and 2% of the product value on orders of ₹10,000 and above.
Is Cash on Delivery available? How do I contact you?
Yes, you can pay by Cash on Delivery or online (UPI, card, net banking). For order, return or product questions, call or WhatsApp us on 7674812669 / 9885300092. You can also visit our showrooms in Hyderabad.
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