OK Richard I was only getting you to commit yourself to mines or potatoes. It only specifies Mk 7, mine that is. Full details of other mines in another publication, which I have, but is not easy to find as I'm catalogueing the 61 documents that I gathered at W&P.
The trailer does look like an agricultural device & one bloke does look as if he is reading a book. But here it is, Minelayer, Mechanical, Towed Equipment, Mk 1. The truck is dragged along by a bulldozer.
Just wait for MO No.100. That contains multiple objects :evil: