Vintage Harmony Model H303A. Guitar Amp Amplifier Turns On, Tubes Glow. I do not have a guitar to test fully. I plugged the amplifier in and the tubes glow. The three glass tubes are made by harmony. The item “Vintage Harmony Model H303A. Guitar Amp Amplifier Turns On, Tubes Glow” is in sale since Saturday, July 3, 2021. This item is in the category “Musical Instruments & Gear\Vintage Musical Instruments\Vintage Guitars & Basses\Guitar Amplifiers”. The seller is “redbike24″ and is located in Warsaw, Indiana. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Costa rica, Panama, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.