How do you tell if a Seiko watch is real or fake?

To tell if a Seiko watch is real or fake, look on the back of the case for the six- or seven-digit serial number. You can use trusted online resources to look up this number to double-check that it is valid and matches your timepiece. Older watches often lack a serial number. However, they usually still feature a model number, which you can cross-reference with information posted on trusted online references. For additional assistance with authentication, consult a certified appraiser or knowledgeable dealer. Find a selection of Seiko watches on 1stDibs.