No returns. There is discoloration, folds, etc. due to age. A world of hobby. For those who are interested, how about it? A practical guidebook that explains in detail how to build a vacuum tube amplifier. - Title: Enjoy Making Vacuum Tube Audio Amplifiers - Release Date: September 30, 2013 - Publisher: Seibundo Shinkosha Co., Ltd. - Features: Color practical wiring diagrams included - Contents: Detailed explanation of how to build a vacuum tube amplifier - Genre: Audio equipment Thank you for viewing.