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The serial number / fabrication number of your welding machine can consist of 2 parts or a combination, depending on the type and age of the unit.
Quinto II part no. 804401000, fabrication no. 1234
Possibility 1) Qineo part no. 8008336101, serial no. 1
Possibility 2) Qineo serial no. 8008316137-1 (in this case please register this number in both fields: article number and serial number)