On 6/3/2013, Peter Caldwell from World Wide Auto Parts in Madison, Wisconsin, USA wrote:
"I worked for the needle maker who sold them to Beck/Arnley back when. A lot of the needles people seem to be referencing have Beck numbers on them. This is the whole product line, so not many numbers, and only a few pertain to A's".

Beck Arnley has their own part numbers for a few dozen SU needles, including those used for MG. Click for a larger printable PDF file showing cross reference from the Beck Arnley part numbers to SU factory needle numbers.