Thanks for sharing, please Airfx is OO scale ( it's 1/76 in fact ), HO is 1/87, even if they use OO / HO to call their armoured small size range , it's well1/76 / 00 scale for Airfix, as for matchbox who never produced in 1/72, only 1/76 : wich is a scale typically British, use for model kits ( of course made by UK builders only ) and Trains ! no UK trains at 1/87, all at 00/ 1/76 ! take care, nice to see old kits !