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Here is an uncommon 1960’s SOLAR power reserve complication measuring 33.5mm. across with gleaming gold filled (no wear) case and stainless steel screw back! The upper indicator displays the amount of winding tension that remains in the mainspring, measured in hours (up to 36 hours); similar to the LeCoultre Power reserve watch! The original silver dial with gold tone markers and matching (interesting) diamond hands is shows only minor aging. The automatic winding movement by AS was just cleaned and is quite accurate.