chequer plate display box

A3 only. A4 to small to use.
print> A3 borderlesss 297mm(11.69)x420(16.54) in greyscale. on 200gsm or greater.
box size; 150mmwide x 78mmhigh x 67mmdeep
construction; print 2x copies, cut out, stick back to back, fold, stick clear film to back of window, stick together but leave one end open.
no restrictions on the PDF so ta can mess about