Non rally dash tach

[mike1968rt]

The spot in a non rally 1968 - 1970 dash was used for a clock or tach. On dashes with neither, there is a hole in the lens for the clock stem. If a tach was included, is this hole, which is not needed for the tach, still be in the lens? I am guessing that the hole is in all the lenses, because if a lens was made without the hole, it would have been used on cars without a clock, as well as cars equipped with a tach.