Sometimes, from what I have read and researched, a branch may exhibit a strange occurence. It may come out with different fruit, different branch characteristics. May be even a fruit does the same.
The fruit you speak of may be an anomaly that can be taken off, as a cutting or air-layer.
If you can reproduce that, you have big $ on your hands.:-)
In all seriousness, you may never see it again as well. Even the Panachee can revert back ( called Reverse but why it's not called Col de Dame is beyond me).
I won't go as far as saying it has figs it normally doesn't have, but just that some genetic abnormality showed itself in that particular fruit of yours.
It's an interesting occurence. It may speak to other genetic variances lying deep within the DNA of the cutting ( tree) that you may be able to re-produce one day.