At the first glance, you might be fooled into thinking that the following is a valid Engineering Instruction, but in reality, B 1312 never existed!

It was created as an exercise following the original instructions on how E.I.'s were produced. It took many hours to draw the diagram and to get the layout, content and text correct.

I present B 1312 here as a bit of a novelty of which I have become rather proud and the information it contains is correct!