Ну чёрным по белому же написано, зачем спорить?
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The GMW-B5000TFC-1 features a diamond-like carbon (DLC) coating throughout
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А вот со страницы GMW-B5000GD
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The full-metal hard stainless steel cases and the bezels of these two models have ion-plated finishes in either black or gold.
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The back covers of the thick screw back cases of these models come with a diamond-like carbon (DLC) finish that is highly wear resistant.
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Про DLC только на задней стороне указано и у
GMW-B5000D-1
Цитата:
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The screw back case, with a highly wear resistant diamond like coating (DLC), gives the watch a feeling of heft.
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И ниже прикрепил таблицу с информацией о покрытии
