FG-360 serial number information: I am appealing to other FG-360 owners.
In 1975 most of the existing models numbers had -1 added to them, on a black rectangular label.
And there are still a few assumptions.
The FG-360 was made between 1972 and 1975.
It is all black except for a sunburst top, with a white pick guard.
Challenges can include finding ones with good necks they were lightly built which probably accounts for the nice tone.