The real solution to cut-off numerals or markers is of course to have watches with a center seconds hand, rather than a seconds subdial. Prior to the development of center seconds hands for watches, makers would occasionally produce watches with very large seconds subdials for individuals for
link whom
link distinguishing one second from another was important. These were sometimes called "doctor's watches," and a classic example is the original Rolex Prince from the 1920s (the
link references 971 and 1343).