ID help on this Cherry...

[dice]

That does not matter. There are two phenotypes that Dr. Carolyn
Pink will throw (no one knows why it won't stabilize to one or
the other). One is a round cherry, the other one is a little bigger
and often boat-shaped, like a miniature Brandywine. I have had
a chance cross with Black Cherry produce tomatoes that looked
like those, red and slightly flattened (oblate), which was likely
the shape and color of the parent that donated the pollen (via
a bee). The fruit were small, a tiny bit bigger than Black Cherry.

The two accessions shown at the URLs above are apparently
stable cultivars with that same shape, but that does not mean
that your cherry plant is one of those. You would need to save
seeds from one of the plants with fruit that looked like that,
then grow more than one plant of it in a future year and see
if they are all the same. If so, they are genetically stable, but
that still would not identify it. If not, the plant that produced
your odd-shaped fruit (for a cherry tomato) was a pre-stable
cross, either an F? in the original packet or an F1 from a bee
in your own garden.

The zippering on the bottom (long blossom end scar) does
suggest a cross with a large-fruited variety like Mortgage Lifter.