Operation has not been checked. The knob is not original. Please check the condition from the picture. (Tracking numbers are not available in some areas). International Buyers - Please Note.Thank you for your understanding. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "waiyorozu-shop" and is located in this country: JP. This item can be shipped worldwide.