This Sea-Gull Ultra-Thin Business Calendar watch pairs a slim 9mm 316L stainless steel case with a synthetic sapphire crystal and a leather strap, giving it a refined profile for daily wear. The 39mm round case and 44.5mm lug-to-lug measurement suit a wide range of wrists, while the pin buckle keeps the strap secure.
Inside, the ST18 automatic movement runs at 28,800 vibrations per hour with 24 jewels, and the calendar function keeps the date at a glance. With 5 bar water resistance and a 49g net weight, it is built for everyday business and casual wear.
Key Features
Brand
Sea-Gull
Model Number
519.13.1076/819.13.1076
Item Type
Mechanical Wristwatch
Movement
ST18
Winding Mode
Automatic Winding
Number of Jewels
24
Movement Frequency
28800
Case Material
316L Stainless Steel
Crystal Material
Synthetic Sapphire
Case Shape
Round
Case Diameter
Approx. 1.5 in
Case Thickness
Approx. 0.4 in
Lug-to-Lug
Approx. 1.8 in
Strap Material
Leather
Strap Length
Approx. 7.5 in
Strap Width
Approx. 0.8 in
Clasp
Pin Buckle
Waterproof
5 Bar
Feature
Calendar
Net Weight
49g
Warranty
2 Years
Origin
Mainland China
Highlights
Ultra-thin 9mm case
39mm round case
ST18 automatic movement
Calendar function
5 bar water resistance
49g net weight
Videos
Materials & care
Case: 316L stainless steel
Crystal: synthetic sapphire
Strap: leather
Clasp: pin buckle
What's included
Sea-Gull watch
Carton packing box
Frequently asked questions
What movement does this watch use?
It uses the ST18 automatic winding movement with 24 jewels and a frequency of 28,800 vibrations per hour.
What are the case dimensions?
The round case measures approximately 1.5 in in diameter and 0.4 in in thickness, with a lug-to-lug of approximately 1.8 in.
What is the water resistance rating?
The watch is rated to 5 bar.
What is included with the watch?
It comes with a carton packing box and is covered by a 2-year warranty.
