Peri only released five models, all of which contained Fidelity electronics. Whilst their chess computers were well designed and attractive they did not sell well, presumably due to the extra cost, and the company soon went out of business. So all Peris are rare. The Epsilon is extremely rare. The Alpha and Gamma very rare. The Delta is also difficult to find, but the Beta less so.

The electronics inside the Peri range is said to be as follows :-
Alpha = Fidelity Micro Chess ?
Beta = Fidelity Designer 1500
Gamma = Fidelity Designer 2000
Delta = Fidelity Designer 2100
Epsilon = Fidelity Par Excellence or Mach III


These are the Peri models I have :-

(1) Beta
(2) Gamma
(3) Delta