They no longer carry a type designation, instead they were just numbered 001 to 004.

The breakdown of the type designation is as follows:

On Barb's records, he was Rod-4, without type designation.

A road, boulevard, way, or thoroughfare with any other type designation may run in any direction.

Several other improvements took place during the production run without changes to the type designation.

Aircraft markings included the type designation and factory suffix, immediately before the individual serial number.

The type designation D.4 was rarely used at the time.

After July 1943, names were given to Navy aircraft instead of type designations.

Like most Waco aircraft, the S series were available with many different engines (identified by the first letter of the type designation).

A range of engines was fitted to the A-129 without changing the type designation.