Light Purple "Registered Full Quart" Bottle," has a bit of a pushed up base inside and the numbers 698 with a dot following that embossed on the bottom.  Good vintage condition with no chips or cracks. This has a double seam going down the sides, no seam on the bottom and is very thick glass.  There's a circular area under the emobbsed lettering on the front.  The back is plain.