The four pieces of wire is so that each side sits flat. If you run a single strand around the corner it bulges out and the boot doesn't sit tight.
It can be (and was) done with a single long piece of wire. If you run some past each corner so as to form a loop that you can tighten by twisting at each corner, it will sit flat. Does that make sense? A bit of practice will help.
I'd use 1/16" dia. tie wire (malleable) That's what I have removed.
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Bluebell
Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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