They out performed the Leica lenses of the period, they are worth more as well
TTH lens division, now called Cooke, are probably still at the top of the lens design ladder but they were bought by Rank the film studios/cinema owners after WWII and the minimal investment went totally to cine lens manufacture. They have made a few LF lenses again in small batches. That's apart from their foray at the UK Governments behest into making Reid cameras, Leica screw mont copies, actua;;y far better engineered.
What no-one knew at the time was that Leitz had hidden prototypes from the Nazis and by the early 50's leapfrogged the Reids with the M series and newer lenses. TTH made one of the faster lenses for them.
Ian