Product Details

· Movement: Quartz 
· Caliber / Jewls: Likely 21 jewels (common for this era) — supports smooth sweeping seconds hand
· Display Features:
· Day window (full day of the week spelled out)
· Date window (at 3 o`clock position)
· Case Material: Stainless Steel
· Water Resistance: 30 meters (splash resistant ) 
· Dial Detail: "GS" likely refers to Grain Structure or dial finish variant
· Crown: Standard push-pull crown with day/date quick-set function
· Bracelet / Strap: Fits standard 18mm or 20mm straps (depending on case size)

Key Details Summary

Feature Specification
Brand Citizen
Movement Quartz
Display Day + Date
Case Stainless Steel
Water Resistance 30m