Walker Colliery, Northumberland, 1762, an engraved silver award medal, walker coll. won 13 jany. 1762 99 fathoms, rev. e tenebris lux, 32mm, 11.92g (cf. SNC February 1981, 1127; cf. DNW 147, 1804). Reverse with remains of old label, otherwise very fine; worthy of further research £90-£120