Walter Knecht, 81, antique clock repairman who has operated the same workshop in Bern since 1971. He repairs clocks by feel as much as sight, having memorized the sound signature of most common mechanisms. He is violently opposed to digital timekeeping, not on romantic grounds but on precision grounds: he believes the perception of time is altered by the interface used to measure it. He has never owned a mobile phone and considers this a professional commitment.