Detailed photos comparing a genuine Casio F-91W with a fake.
Casio F-91W - Wikipedia
Back Light Spreader for Casio F-91W, A-158, A-159, A-171, W-59, F-94W, Sensor Watch and More, Drop-in Replacement Modification Upgrade
Is This Casio Fake or Real?l Post. F-91W-3DG: Moved to Fake G-Shock Report
Feature: The Most Accurate Fake Luxury Watches In The World
Received this F91W - looks fake to me : r/casio
Comparing a genuine Casio F91-W with a fake
My F-91W doesn't have the little U under resist,is it real? : r/casio
Feature: The Most Accurate Fake Luxury Watches In The World
Is This Casio Fake or Real?l Post. F-91W-3DG: Moved to Fake G-Shock Report