Cloth Seal, Castle

Cloth Seal, Castle, Image by StuE, Found by Nasher.
Found in North Hertfordshire / Cambridgeshire area, 16 x 20mm, 2.9g.

Castle tower with battlements and the letter P in the gateway beneath a portcullis. Reverse has coarse cloth imprint (back disc missing).

Will hopefully match up with some regions arms in time.