Cloth Seal, Dutch, Rotterdam Stael Seal

Cloth Seal, Dutch, Rotterdam Stael Seal, Image & Submitted by Martijn Schaftenaar.
Found in the Netherlands, 72mm.

(ROTTE)RDAMS / (DUBB)ELTSTAEL / CASTOOR // crowned arms of Rotterdam

From the finder, "It's a cloth seal showing dubbel stael and castoor (beaverskin (which is sometimes used in the hats of officers))."

The stael mark usually applies to cloth that has met certain dying standards.

See Oostveen, J. van, 2017, 'Textielloden uit de bodem van Rotterdam' for many examples of Rotterdam cloth seals.