To decode a TC Electronic serial number, you must identify the product's manufacturing era, as the system changed significantly after the company's acquisition by Music Tribe
WWYY, where:
Pedal Box: If the sticker on the pedal is missing (common with velcro use), check the original box; the serial number is almost always printed on the side label.
Conclusion
The Decoder Ring:
Rack Gear: Typically located on the back panel near the power input or MIDI ports.
Digits 1–3: These three numbers indicate the manufacture date.