These are Siemens AT600 full feature analogue telephones, also known as the ATL Berkshire 600.
They are brand new and boxed with instructions etc.
This is what the manufacturer says about the phone:
Increase the ease with which you manage calls still further and free up your hands with the Berkshire 600 speaker phone. If the occasional conference call is required, gather your colleagues around for a maximum use of this popular feature.
Along with ergonomic call handling, the power of speed dialling from memory is doubled from the Berkshire 400 to 24 memory store locations.
Entry of these stored numbers is made even easier with the help of a LCD display, which also provides you with time and date information.
For customers that need to monitor their call time for reporting, the display offers this ability automatically the moment a call is made or received.
Telephone Features: