This Technical Report lists the monograms and marks which identify manufacturers of EN aerospace products. This Technical Report is applicable to all items where the product standard refers to EN 2424 or expressly states that the source of manufacture is to be identified on the part. This Technical Report is for reference purpose only and reflects the information provided by the listed companies on the date of the publication. The fact that a manufacturer is recorded in the list does not automatically imply that he has been qualified.