Here are three tougher spools in great colors -- actual postage additional:

Green spool with the Buller's (British) logo ink stamped - no issues -- $12 (SOLD)

Nice mottled blue spool from Australia -- incuse KP (Koester's Pottery) -- one tiny peck -- $12 (SOLD)

Scarce spool with a slot for a patent mine insulator holder -- dry process embossed THE OB CO MANSFIELD O. -- true black glaze -- $15 (SOLD)