Ducati Diavel Workshop Manual page 26

Identification data
3 Variant – Numeric or X (Check digit)
4 Model year (A=2011)
5 Manufacturing facility
6 Progressive serial No.
Data stamped on engine
Europe version
1 Manufacturer: Ducati Motor Holding
2 Engine type
3 Progressive production No.
Data stamped on engine
US version
1 Engine type
2 Model year (B=2011)
3 Progressive production No.