How can I tell which version of the REAL BLUE/BLUE NC I have?

The older models REAL PURE, BLUE (2020) as well as REAL BLUE NC (2020) have a red fabric cover inside the cushion. The new REAL BLUE/BLUC NC models (on sale since Nov. 2021), on the other hand, are equipped exclusively with a black fabric cover.

Left image: Red fabric cover inside the cushion = REAL BLUE (2020) and REAL BLUE NC (2020).
Middle image: Black fabric inside the earphones = REAL BLUE and REAL BLUE NC

Right image: Microphone beneath devil logo = REAL BLUE NC 3

The older models REAL PURE, BLUE (2020) as well as REAL BLUE NC (2020) have a red fabric cover inside the cushion. The new REAL BLUE/BLUC NC models (on sale since Nov. 2021), on the other hand, are equipped exclusively with a black fabric cover. The newest model, the REAL BLUE NC 3 (available since January 2025) have a microphone port beneath the devil logo.