A Modern Interpretation of the Grand Seiko 45GS

JX Su and Jason Lee, for Watches by SJX, on the faithfulness of the limited edition reproduction of this historic Grand Seiko reference:

The dial is identical to that on the original, right down to the Daini Seikosha lightning bolt logo just above six o’clock. It was employed to distinguish watches made by Daini Seikosha from those made by Suwa Seikosha, both factories making Seiko watches but rivals within the wider Seiko-Hattori group of companies.

The free-sprung balance wheel in the caliber 9SA4 that powers these new Grand Seiko references (SLGW004 for the gold and SLGW005 for the stainless) are a welcome improvement over the pin-regulated balance wheels employed in the 4520A, 4522A, and 4580A calibers found in the original 45GS family of references.