Nice bottle Greg, Its not super rare but no super common either. The value is around $10-15. I was able to get one for $10. There are a few different versions of this bottle, one does not say registered over the plate like yours and there is also a 24 oz one with a round slugplate. Anyway, its defenetly a cool bottle. Not many say Manufacturer of Ice Cream and Soft Drinks. Was this found in Baltimore?