Panasonic KX-T7300 series phones

The Panasonic KX-T7300 series of analog multi-line phones was available for several years in several countries before it came to the US in the late 1990s, and then quickly discontinued.
The KX-T7320 is a non-display speakerphone with 12 CO buttons. The KX-T7330 is a display speakerphone with 12 CO buttons. The KX-T7350 is a non-display monitor phone with 12 CO buttons. The KX-T7310 is a single-line phone with message/ringing lamp. The KX-T7315 is a single-line speakerphone with message/ringing lamp.
A KX-T7340 DSS/BLF panel was available in lots of countries, but not the US.
7300 series phones sold in the US had white HOLD buttons; they were orange in other countries.