Epson HX-20 Expansion UnitAccession Number : 2023.2.15Medium: HardwareProduct Name: Epson HX-20 Expansion UnitManufacturer: Seiko EpsonModel: H20EUDeveloper: Yukio YokozawaYear: 1982Identifying Number: 512528Accession Number: 2023.2.15Printed MatterSoftwareHardwareAudio-Visual