Old tin mine, located on eastern Craddock Moor and immediately west of the South Phoenix Mine, was earlier known as New Phoenix Mine and also referred to as Wheal Cheesewring. The mine’s sett is bordered to the north and south by the West Phoenix and Craddock Moor mines, respectively. It encompasses two southeast-trending lodes, believed to be the western extensions of the lodes worked at South Phoenix Mine: Grace Dieu Lode in the north and Prosper Lode in the south. Shallow pits on the surface mark the strikes of these lodes from older workings.

The underground workings consist of a crosscut adit starting on the southern slope and extending 160 feet north to meet Prosper Lode at 25 feet below the surface. Additionally, there is a level driven 120 feet west and 20 feet east of the junction along the strike of the lode. The ruin of the engine house, located slightly south of the adit entrance, is marked by the grid reference. No production records exist for this mine.

In 1937, the property was prospected again, yielding promising results from samples taken at irregular intervals from old surface workings and the level on Prosper Lode, showing up to 30 pounds of black tin per ton. A shaft was sunk between the lodes, but the project was abandoned shortly after. During World War II, the mine was reopened in hopes of quick returns. The shaft was extended to a depth of 120 feet, with crosscuts driven north and south from its bottom. However, systematic sampling assays revealed average grades of barely 10 pounds of black tin per ton in Grace Dieu Lode and even poorer grades in other lodes. Consequently, the mine was closed in 1943 with no production.

1908-1909 1911-1913 1940s