Comelit: 2703U
 
The 2703U is the latest style Universal hands. Technically the same as the 2603U.  This universal telephone is compatible with the majority of telephones produced by the major world producers. It has a door-opening push button and a free button for various uses.
Handset compatability chart 
 
Can be used to replace a number of older model Comelit handsets as well as handsets of other manufacture.