Diana Postwar Tinplate Air Rifles
Diana Mk116 (Milbro) shooting outfit.
I'll put this UK Milbro-made kit in here, despite the fact it was not made by M&G and so technically not a 'vintage Diana' at all. The gun is a direct copy of a Diana model and of course the 'Diana' brand in the UK was formerly (and latterly) an M&G one.
With thanks to Tim of www.timdysonairguns.co.uk for these pics. Tim thinks the inner box is wood: