Good enough to doubt the model year. Coral double cone 16cm full range unit. Uses a long voice coil that was also used in the beta series. It literally has a straightforward and light sound (Murakoshi Yoichi)
Maintenance information: 2022.12.1 sound output confirmed
Accessories: original box
Main specifications: 16cm double cone full range 8Ω 98dB baffle opening dimensions 143 φmm 1.4 kg