It looks like a copy of a Dunlop K70 which is an appropriate fitment on an M20, it's actually a road tyre not a trials type, but it does have a period look and you do see a lot fitted to m20's and they do look period, the Dunlop K70 is still made in india. the Coker tyre if i remember rightly is quite expensive compared to the ones made in India, so it may be worth comparing the prices
