Take a look inside the historic Hetty Pit colliery winding house

A 140-year-old Victorian colliery winding engine has gone on display to the public... for one day only!

The giant machine wound miners and coal at the Hetty Pit near Pontypridd.

Volunteers have spent a more than a decade restoring it.

Mike Griffiths went to see it in action.

Drive into Rhondda Valleys from Pontypridd and the Hetty Pit will be something of a landmark.

Formerly part of the Great Western Colliery, it hasn't been a working coal mine for more than thirty years.

Now a team of volunteers are determined to save the buildings that remain.

The main attraction - the steam winding engine that for more than a century helped transport miners underground.

More: Wales' National Mining Memorial unveiled

The Hetty Pit (left) and Ty Mawr Colliery (right) Credit: ITV Wales archive

The mine opened in 1875. For the last decades of its life it was part of the nearby Ty Mawr and Lewis Merthyr Collieries.

In 1983, it closed for good.

More: Marking 30 years since the start of the Miners' Strike

The name of the last man to operate the Hetty winding engine before the shaft was decommissioned is written inside the winding house

Lewis Merthyr is now a popular mining museum, but the Hetty has been largely off-limits.

Now, the public have had a rare opportunity to see inside.

The public had a chance to operate the winding engine

Many of the volunteers have given up weekends over the last twelve years to restore the engine.

Some of them have a very special link with the site.

The engine now operates on compressed air

More: Replacement mine memorial for Abercynon

Running the engine isn't cheap, and these open days are a rarity.

The team now hopes to refurbish the giant headframe above the old mineshaft.