LEATHER - REVERSED CALF / ROUGH CALF
Calf skin that is reversed with the flesh side or burr outward to present a suede-like appearance. Reversed calf is not durable, thus older examples may be in a deteriorated state.
The first image shows the burr of the leather on a copy of 12 George III Statutes from 1772. The second image shows how the burr of the leather has been smoothed or polished by repeated handling.