Toni, did the box look similar to the green ones in this picture? http://images.andale.com/f2/115/106/3561856/1084967283418_museum_sa_hubs.jpg these are all dated mid 1950s.
Toni Theilmeier said- "The other item is a nearly empty cardboard box which used to hold a=20 Sturmey 3sp. gear of which there is now only some wrapping paper and=20 some small periphery bits left. The box is green, the hub is nicely=20 depicted in b/w. Can anyone roughly date it? Also the box contained a=20 cone spanner which does not have the small, tell-tale encircled "SA"=20 stamped on it. Would it have been part of the original complement or=20 not, I wonder?"