Many years ago, I purchased an Alpha Electret condenser Headphone HPE-888 with adaptor. As the headphones were not used for many years, I did not realized that the adaptor was missing. Do anybody knows where the adaptor for this headphone model could be purchased? I also would like to know who is or was the manufacturer of this device. There is not indication neither on the box nor in the earphones itself that says where or who made it.
Thanks for any assitance on this matter.