Thanks PN ... My first one was the Grey with only one perspex knee pad on the right leg with a flapped small knee pocket on the left leg (I think this was originally designed for the First Aid Kit). But velcro had just been discovered ... which was used to secure the knee pocket flap, waist tapes and epaulettes. So I guess this was a yet further Mk(5?) ... thence replaced (for me) with a 'shapeless' Green Mk11 (I think).