The SEIKO INST QUARTZ SC20S-9PF20PPM is a high-precision and reliable watch movement, designed for those who value accuracy and performance. This quartz movement features a frequency of 20 parts per million (PPM), ensuring exceptional timekeeping precision. SEIKO is renowned for their craftsmanship and attention to detail, making this movement a top choice for watchmakers looking to create timepieces of the highest quality.