Double anti-reflective treatment for better readability. All our watches are fitted with sapphire crystal. This is cut from a polished slice of solid sapphire that has been created by the fusion and crystallization of alumina. Sapphire is so hard that only a diamond can scratch it. Scratch resistant sapphire crystal fitted into the casebook shows TAG Heuer calibre in action. Water resistant to 100 meters ensured by rigorous manufacturing standards and strict testing. Date window at 6 o'clock. Chronograph minute at 12 o'clock and chronograph hour at 6 o'clock counter with azurage. Running second is at 9 o'clock. Hand-applied polished faceted indexes. Polished silver hands and hour and minute hands feature luminescent markers. Monochrome TAG Heuer logo. Anti scratch curved sapphire crystal. Polished crown and push-buttons. Polished bezel. Protruded monochrome TAG Heuer logo. Embossed running second counter at 9 o'clock. Polished steel case. Applied rings around chronograph counters with azurage at 6 and 12 o'clock. Tachymeter scale on the flame for average speed measurement. The tachymeter indicates the average speed of a car, for example, by measuring the time taken to cover a given distance (a kilometer or a mile).