A timepiece comprising: a dual-purpose scale , indicating time and a below-mentioned physical quantity; a driving unit for hand , driving a hand for pointing the dual-purpose scale according to time; an acquisition unit for physical quantity , acquiring external information of the physical quantity from predetermined time designated as a starting point; and a driving unit for indicator of physical quantity , driving an indicator of physical quantity for indicating the acquired physical quantity on the dual-purpose scale, where a position on the dual-purpose scale pointed to by the hand at the predetermined time is designated as an original position for the physical quantity, characterised in said timepiece further comprising: a storage unit for color information of indicator of physical quantity , storing color information of indicator of physical quantity , where the external information and a color of the indicator of physical quantity are correlated, and the driving unit for indicator of physical quantity further comprising a first driving section for driving the indicator of physical quantity at a proportion, where a position on the dual-purpose scale pointed to by the hand at current time indicates a target level for the physical quantity at the current time, a first determination section for determining whether a position indicated by the indicator of physical quantity is larger than the position on the dual-purpose scale for indicating the target level, and a first control section for color , controlling the color of the indicator of physical quantity according to the determination by the first determination section. a dual-purpose scale , indicating time and a below-mentioned physical quantity; a driving unit for hand , driving a hand for pointing the dual-purpose scale according to time; an acquisition unit for physical quantity , acquiring external information of the physical quantity from predetermined time designated as a starting point; and a driving unit for indicator of physical quantity , driving an indicator of physical quantity for indicating the acquired physical quantity on the dual-purpose scale, where a position on the dual-purpose scale pointed to by the hand at the predetermined time is designated as an original position for the physical quantity, characterised in said timepiece further comprising: a storage unit for color information of indicator of physical quantity , storing color information of indicator of physical quantity , where the external information and a color of the indicator of physical quantity are correlated, and the driving unit for indicator of physical quantity further comprising a first driving section for driving the indicator of physical quantity at a proportion, where a position on the dual-purpose scale pointed to by the hand at current time indicates a target level for the physical quantity at the current time, a first determination section for determining whether a position indicated by the indicator of physical quantity is larger than the position on the dual-purpose scale for indicating the target level, and a first control section for color , controlling the color of the indicator of physical quantity according to the determination by the first determination section. <EOS>