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Before we go straight into the review, it would be good to clear up the reference codes used for this series. The Astron is a Made-In-Japan watch line. However, it is not strictly defined as a JDM (Japanese Domestic Market) as it is sold globally. Nevertheless, in true Japanese manufacturing quirkiness, this series has been earmarked with the “SBXB” code when in Japan while the rest of the World has been allotted the “SSE” code. The numerical part of the overall reference code remains the same. Therefore SBXB047 is in fact the SSE047.