Where was the 400/4 made

[Honsa]

I've always thought that the 400/4 was made at Hamamatsu but that apparently is not the right answer and Wikipedia is not much help either. Could someone please enlighten me. Looks like this years Xmas book is already chosen if i can't get that right. 

[TrickyMicky]

I think the majority of the remaining ones were made in Britain with parts being supplied from Leiston, Suffolk!