Anglopterum magnificum
Wing of a dragonfly-like insect from the extinct group of the Palaeodictyoptera.
Length of the wing 13 cm! The animal had a wingspan of about 30 cm.
It is in a siderite nodule from the (now closed down) opencast coal pit Crock Hey near Manchester.
Upper Carboniferous (Westphalian A). Photo by the finder Andy Tenny.  

Reconstruction of a similar insect
Part and counterpart