A quintessential New England mystery piece with no solid identification to what the marking stands for or who made them, though I strongly suspect these were made by Porcelain Products. Most all found have been from New England.

[id=297545271]

This example has a nice Mottled glaze and is very near mint with a clear marking.

When was the last time you've seen one for sale?

$65 plus shipping. PayPal F&F preferred.