Starting in 2008 Hot Wheels began using base codes. These base codes can be interpreted as follows.
Letters = Year of Manufacture
| A | 2008 |
| B | 2009 |
| C | 2010 |
Numbers = Week of the year
| 1-52 | Week Of the Year |
Example: B12, B indicates the car was manufactured in 2009. 12 being the 12th week of the year puts the production date approximately the end of April.