Wilkie 7 day set date

[The Boxer]

I've just received a Wilkinson seven day set in the nice chrome box, and contents which have never been used. I've just noticed that the logo on the interior purple liner says Wilkinson Sword Co, not Wilkinson Sword Co Ltd. I have another identical set which does say "Ltd". Is there any difference in the date of manufacture with this new one, or is it simply a mis-print?