Cloth Seal, Cloth Worker's Personal Seal, Privy Mark AB, 1500~1700

Cloth Seal, Cloth Workers Personal Seal, Privy Mark AB, Image by StuE, Found by Nasher.
Found in North Hertfordshire / Cambridgeshire area, 17mm, 6.1g.

Privy mark with SC on a vertical line and AB or TB on a horizontal line, however the C also bisects the AB and other lines mean that it could be a complex ligature. The other side has three distinct lines drawn into it with what appears to be a heated implement.