Welcome! If this guitar is indeed from 1976 I would expect it to have Schaller M-6 mini tuners. However, it's not impossible that the guitar was ordered with the Grover RotoMatics. If these are not the original tuners, then I would expect to see two small screwholes of the original Schaller tuners, which would probably not be hidden by the Grovers, even though they are a slightly bigger format.
The picture is not clear enough for me to see, so you need to check that yourself. As far as the Grover RotoMatics are concerned, they look gold to me in the photo, albeit with the gold worn off showing the nickel plating that was underneath the gold.
Edit: Is there a possibility that this guitar is a little older than stated? Can you give us the serial number?