This shirt was one of a very limited run (less than 50) that were produced for IBM's customer education centre (IBM Southbank, London) in about 1998-1999. The rugby shirts were commissioned by the donor for the technical instructors who were teaching on IBM's Rise System/6000 platform (now IBM System p) and AIX operating system in the UK.

At the time the donor was the curriculum manager and senior technical instructor of IBM's RS/6000 & AIX customer education business in the UK and Ireland. These rugby shirts were available only to 'AIX instructors and their partners'.

The definition of 'AIX instructor' extended to many freelance instructors employed by IBM at the time, including a handful who used to fly in from overseas to teach particularly specialist courses.

Eventually IBM had to drop the idea of instructors wearing a quasi-uniform, not least because just about every customer on an IBM RS/6000 & AIX course wanted a rugby shirt, and in due course IBM rebranded RS/6000 as pSeries and then System p, and dropped the coloured diamond logo.