Piano tuner Martin Backhouse stands at the Ludow Museum in England with the piano in which he found a stash of gold. (Richard Vernalls/Via AP)

British officials say they’ve been unable to trace the rightful heirs to a trove of gold coins found stashed inside a piano and worth a “life-changing” amount of money.

The school that owns the piano and the tuner who found the gold are now in line for a windfall after an official investigating the find declared it treasure. But a couple who owned the piano for three decades before donating it to their local school will probably miss out.

British official John Ellery said Thursday that, despite a thorough investigation and a public appeal for information, “we simply do not know” who concealed the coins.

The hoard was discovered last year when the piano was sent for tuning in Shropshire, central England. Under the keyboard — neatly stacked in hand-stitched packages and pouches — were 913 gold sovereigns and half-sovereigns minted in the 19th and early 20th centuries.

Piano tuner Martin Backhouse said when he found the pouches and slit open the stitching, he thought: “Ooh, it looks like there’s rather a lot of gold in this.”

The 913 gold coins were hidden in the piano. There’s is no exact value yet on the coins, but British officials say they are worth a “life-changing” amount of money. Backhouse and the school that owns the piano will share the money when the coins are sold. (Richard Vernalls/Via AP)

The hoard, which weighs 13 pounds, has not been formally valued. But Peter Reavill of the British Museum has said the trove is worth a “potentially life-changing” amount.

Money received from items declared “treasure” is generally split between the owner — in this case, the Bishops Castle Community College — and the finder.

The piano was owned for 33 years by Graham and Meg Hemmings, who donated it last year to the school near their home. But Meg Hemmings said she’s not bitter at missing out on treasure that was right under her nose.

“The sadness is, it’s not a complete story,” she said. “They’ve looked and searched for the people, and they unfortunately haven’t come forward.

Graham and Meg Hemmings, who owned the piano for 33 years, gave it to a local community college last year. They are not entitled to money from the treasure, officials say. (Richard Vernalls/AP)

“It’s an incomplete story — but it’s still an exciting story.”