tkefan29, 321A was discontinued in March 2001. For example, if the interlock says “0201”, that means February 2001. If it says “0401”, that means April 2001. If the interlock was made before “0301”, then it’s a 321A. If the interlock was made after “0301”, then it’s a 330A. But, this is definitely a 330A, because the “*1” braille has a bigger star on it.