Apple has rolled out a new ImageWriter II printer without changing the
printer's name. The easiest way to identify the new model is by observing
where the serial or power connector is located. If the connector is on the leg
of the printer, you have an old ImageWriter II. Otherwise, it is the recent
model.
Service addressed the identification problem by using the suffix "/L" in all
their service documents referring to the new printer. Articles in the Tech Info
Library follow this same convention.