Where is the serial number on a Smeg washing machine?

Open the door and look behind it around the opening. The label gives the product code and serial number.

Where the rating plate is1
  1. Around the door opening, on the rim of the drum

Source: Smeg UK – How to find product code and serial number

How old is my Smeg washing machine?

Copy the FD or S/N number from the plate, or paste everything on it.

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