Museums don't always have it right. It could be Bagley; it could that the design was modified and the same number was used (they did that!), but I wouldn't date yours or the museum's piece to any newer than early 1960s because of the floral trim. Why don't you contact the museum and ask them how they arrived at that attribution. I think Wakefield is one of the helpful museums.
It is also possible, I suppose, that it was made specially for Woolworths, or somewhere, by Bagley. And I have just realised that you have gilding. Gold-trimmed Bagley is uncommon, I was going to say I hadn't seen any, but I have seen a gold-trimmed Carnival fruit set (or part thereof).