KT-4077 is the US export model of KT-GS5, KT-V770 the EU model. It came in black only, while KT-GS5 came in white, black and red.

KT-AS2 succeeds KT-AS1: KT-AS2 has only one headphone jack and the tuner cards are different. ≡

Marketed Japan, as export or tourist model, under KT-V870.

The KT-S3 was the 3rd in the KT-S series. It could be equipped with tuner pack RP-S2 for FM radio reception. ≡

Tuner RP-AF1 is paired with this unit.

Unlike KT-VS1 and KT-VS2, the AM/FM tuner is now built-in. This is last model in the RT-VS series, non auto-reverse. The RS-V300 is the portrait mode version.