SEIKO Digital Flip clock - Features: Alarm function SEIKO Digital Clock DP690T I purchased this flip clock, which has been serviced, from an antique shop. It's a flip clock from around the 1970s to the early 1980s. It keeps time accurately. The hertz can be switched, so it can be used throughout Japan. It is currently running on 60Hz in the Kansai region. Please set it to 50Hz in the Kanto region. The alarm sounds quite loud. Thank you for viewing.