Instant purchase without comments is welcome! This is an early headphone developed by SONY. It has a metal body, a leather-covered headband and ear pads, and a fabric-wrapped cable, making it a very sturdy construction. Condenser headphones themselves are rare, but this model is unique in that it was made by SONY. [Condition of the product] I believe it is in good condition for its age, as it has been carefully stored. I have confirmed that sound is produced from both the left and right sides, but please understand that this is a used item before purchasing.