Penprys Pit was developed circa 1840 by the Llangennech Coal Company and worked until circa 1885. 

Sources:
Collieries of Wales, RCAHMW
A Guide to the Industrial Archaeology of the Swansea Region, by Stephen Hughes and Paul Reynolds, AIA, 1989

Claire Parry, RCAHMW, 24 August 2011.

The winding house is still intact but overgrown (2020).