A sign comprising: - an elongated base profile with a bottom portion, a first over-folded edge portion arranged along a first side edge of the bottom portion and a second over-folded edge portion arranged along a second side edge of the bottom portion opposite the first over-folded edge portion, the bottom portion having a front side and a backside; - one or more sign elements which are received in the base profile and arranged on the front side of the bottom portion, each one of these sign elements having a first edge portion which is in engagement with the first over-folded edge portion of the base profile and an opposite second edge portion which is in engagement with the second over-folded edge portion of the base profile; and - a covering plate displaceably received in the base profile and arranged on the front side of the bottom portion at the side of the sign elements, this covering plate having a first edge portion which is in engagement with the first over-folded edge portion of the base profile and an opposite second edge portion which is in engagement with the second over-folded edge portion of the base profile, characterized in: - that a bar code label is arranged on the front side of the bottom portion between said first and second over-folded edge portions (4a, 4b) and at the side of the sign elements; - that the covering plate is displaceable in relation to the bottom portion to and fro between a first displacement position, in which the covering plate is located on the bar code label and thereby protectingly covers the bar code label, and a second displacement position, in which the covering plate is located at the side of the bar code label and thereby leaves the bar code label accessible for reading; and - that the sign comprises a springy locking member which is intended to be clamped to the base profile by engagement with the first and second over-folded edge portions (4a, 4b) of the base profile to thereby keep the covering plate in said first displacement position. - an elongated base profile with a bottom portion, a first over-folded edge portion arranged along a first side edge of the bottom portion and a second over-folded edge portion arranged along a second side edge of the bottom portion opposite the first over-folded edge portion, the bottom portion having a front side and a backside; - one or more sign elements which are received in the base profile and arranged on the front side of the bottom portion, each one of these sign elements having a first edge portion which is in engagement with the first over-folded edge portion of the base profile and an opposite second edge portion which is in engagement with the second over-folded edge portion of the base profile; and - a covering plate displaceably received in the base profile and arranged on the front side of the bottom portion at the side of the sign elements, this covering plate having a first edge portion which is in engagement with the first over-folded edge portion of the base profile and an opposite second edge portion which is in engagement with the second over-folded edge portion of the base profile, - that a bar code label is arranged on the front side of the bottom portion between said first and second over-folded edge portions (4a, 4b) and at the side of the sign elements; - that the covering plate is displaceable in relation to the bottom portion to and fro between a first displacement position, in which the covering plate is located on the bar code label and thereby protectingly covers the bar code label, and a second displacement position, in which the covering plate is located at the side of the bar code label and thereby leaves the bar code label accessible for reading; and - that the sign comprises a springy locking member which is intended to be clamped to the base profile by engagement with the first and second over-folded edge portions (4a, 4b) of the base profile to thereby keep the covering plate in said first displacement position.