Grand Seiko Hi-Beat – Ref. 5646-7010, Juli 1971 (Suwa Seikosha) - Neuer Service / Revision (12/2025) Quarz Commemoration of the 25th anniversary

Commemoration of the 25th anniversary of the Shinkansen 500 series (1997 – 2022)

Armband: Schwarzes japanisches Echtlederband („Made in Japan“ geprägt)

outer packaging

including the elegant "no-day" version shown here with understated lines

Die klaren

Grand Seiko Hi-Beat – Ref. 5646-7010, Juli 1971 (Suwa Seikosha) - Neuer Service / Revision (12/2025) Quarz Commemoration of the 25th anniversaryThis elegant Grand Seiko Hi Beat automatic watch dates from July 1971 and was manufactured in the renowned Suwa Seikosha factory . It belongs to the famous 56GS series , which was produced from 1968 to 1974 and marked the transition from classic hand wound Grand Seikos to modern, automatic precision models. Background and historical significance The 56GS series replaced the previous 45GS and 61GS lines and introduced, for the first time, an automatic