Format 1: Manufactured by American and U.S. Craftmaster

Sample Serial #: 063812019

Format 2: Manufactured by State Industries

Sample Serial #: C06A136750

Format 1: Using the serial number locate the first through fourth digits. i.e. 063812019.

The first and second digits are the year of manufacture.

The third and fourth digits are the week of manufacture.

Using this sample serial number. The unit was manufactured the 38th week of 2006.

Format 2: Using the serial number locate the first through third digits. i.e. C06A136750.

The first digit is the month of manufacture. (A=January; B=February; C=March; D=April; E=May; F=June; G=July; H=August; I was not used; J=September; K=October; L=November; and M=December.

The second and third digits are the year of manufacture.

Using this sample serial number. The unit was manufactured in March, 2006