What is the difference between the standard lever inserts for the pre-2002 AL and the old D Lever?

The old D-Series Lever used a standard lever insert similar to the pre-2002 AL-Series standard lever insert.  The old D Lever insert was smaller than the AL and the two were not compatible, Fig. 1. 

 

Figure 1: AL-Series pre-2002 standard lever insert, A700-015 (top) compared next to an old D-Series Lever standard lever insert, C604-330 (bottom).

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