I am no expert, but this appears to be an oil painting of a tall ship signed by "Jackson." The frame shows some wear and the back of the canvas has several small tan blotches as can be seen on the photo below.
Oil on canvas in wood frame.
Signed "Jackson" in lower left.
Size and dimensions of this item:
canvas: 23.5" wide x 42.5" high
I bought this at a thrift store in San Diego CA this week.
Price Paid (If known):
$23 at thrift store.