Most 1/2" reel to reel videocorders (VTRs) were manufactured between 1965 and 1971. Some VTR tapes were recorded in the Sony CV "skip-field" format. Other tapes are often in the more popular EIAJ format, used in many videocorders manufactured after 1970. Unfortunately the formats aren't interchangeable and you'll need the correct machine to playback your particular tape. If you're confused about which 1/2" videotape recorder you need, please read our article or contact our technician for advice.