Can anyone tell me when this timepiece was manufactured, I have been reading, forums, and understand that Leonidas would add the brand Heuer to their timepieces although they were not the same manufacturer, the box is blue, and only has Leonidas on it, but the guarantee booklet does have both names hyphenated, the watch is not my own, I am trying to find out some information on behalf of a colleague.
Thank you for any help you can give me,

Kind regards,
John Romer.