Well the ever vigilant Woodstock has rocketed to the rescue with an ID on my mystery rocket. A trawl through the archives reveals a photo from a long dead auction which shows a red version of the rocket, looking even more like Task Force 2 than ever. The picture is small and unclear, but Mr W tagged it as a 'Rocket Pencil Case'. A swift Google flagged up the Attic of Astounding Artefacts blog and a shiny silver chrome version of the item.
http://astoundingartifacts.blogspot.co.uk/2010/05/sp-560-rocket-pencil-case-unknown-1950s.html?m=1