Just to clear up the Teachers varieties. Teachers Highland Cream has a minimum of 45% malt, Teachers 50 has a mimumum of 50% malt Teachers Original [launched last year in India] has a mimimum of 65% malt and Teachers 60 did have 60% malt but was only bottled for a couple of years in the mid 1980's.
Being Teachers every style has/had the malt content on the label and have done this for the past 60/70 years and possibly longer and is the only brand that I know of that states this. There are a couple that hint that they have more but have never come out in print with an actual figure.
I hope this clears any problems