Cloth Seal, Cloth Worker's Personal Seal, Privy Mark, BD

Cloth Seal, Cloth Worker's Personal Seal, Privy Mark, BD, Image by StuE, Found by Nasher.
Found near Baldock, Hertfordshire, 23mm, 8.9g.

I (6?) P S stamped, 28 (scratched) // partial privy mark B D to sides

A cloth worker's privy marked personal seal with a probable length of 28 yards scratched on.