In the last few airframes of the series a new panel with the same "vertical tape" guages that were used in the original Sierras were introduced, these were known as an A24-not to be confused with the first Sierras which were A24R models.
These were known as an A24-not to be confused with the first Sierras. This was in the last few airframes of the series. A new panel with the same "vertical tape" guages were introduced the series. This first Sierras were A24R models. These same "vertical tape" guages were used in the original Sierras.