No luck? Reply with the 4-digit movement number from the caseback (looks like “Cal. XXXX”) and I’ll find the exact manual for you.
🔍 This appears to be a specific variant (likely a JDM – Japanese Domestic Market model) of a classic Eco-Drive chronograph. Searching the full string can be tricky. citizen eco drive gn-4w-s-12g manual
If you own (or are trying to find) the manual for the , here’s what you need to know: No luck