Join us on Facebook: Search for 'ConcoursMustang' Private group!https://www.facebook.com/groups/concoursmustang/Indiana SAAC Fall Classic , French Lick, IN Oct 11-12http://www.insaac.org/SAAC National-Sanctioned Concours Event
If a car was not ordered with the Optional Dash Clock then it would have had a blanking plate in the center small gauge hole. It had the look of a gauge but did not have any function, it was just a plastic plate with gauge markings printed on it. If you go that route just make sure you get one from a 67, the 68 has a different part number and I have never had the 2 together to compare them for differences.
The clock was an option - you would need to look at your Marti report or your buildsheet to see how your car was originally equipped.