A manual-winding 10 Beat

A successor to the 44GS, and possibly one of the best movements of the era created by Grand Seiko

Not long after the release of the 61GS in 1968, Daini Seikosha unveiled the 45GS, also powered by a 10-beat movement, this time a thin one (3.5mm) with a manual winding mechanism. There were two movement variants: Caliber 4522 had a calendar display with an instantaneous date change feature, and Caliber 4520 was time only. Many of the 45GS share much of the same design language as the 61GS, and offer the same high level of precision regardless of position or external disturbances. The month that Suwa unveiled the 61GS V.F.A., Daini presented the 45GS V.F.A., which featured a updated version of their manual 10-beat movement, also rated to +- 1 minute per month.