A sign comprising: an elongated base profile (2) with a bottom portion (3) and two longitudinal over-folded edge portions (4a, 4b); one or more sign elements (8) which are received in the base profile (2); a bar code label (10) on the front side (6) of the bottom portion; and - a covering plate (11 ) which is displaceably received in the base profile (2) and arranged on the front side of the bottom portion at the side of the sign elements, this covering plate being displaceable in relation to the bottom portion (3) to and fro between a first displacement position, in which the covering plate (11 ) is located on the bar code label (10) and thereby protectingly covers the bar code label, and a second displacement position, in which the covering plate (11 ) is located at the side of the barcode label (10) and thereby leaves the bar code label accessible for reading.