Earless Rollers are extremely rare.  So far, only six of these unique floats have been identified.

As the name implies, these small floats don't have ears.  One end of the roller is sealed and the end appears to be flattened on purpose.  The reason why they were flattened on one end is not known but they can stand on end because of the flat end.

I purchased this float from Shannon at the 2021 Beachcombers Fun Fair.  It has excellent provenance since Shannon bought it from Woody Woodward who found it in Northern Japan.