Geyser Spring Saratoga Spring New York bottle question

[NorthEastRelics]

The one this guy is selling has the 'X' on the base you can see in the picture.

http://www.ebay.com/usr/eclecticsundries" onclick="window.open(this.href);return false;

I have seen others with no 'X' on the base and slightly different font on the embossing as well as size of the letters/arrangement. I was wondering if anyone could explain the difference and what it means. Thanks.

[Leon]

I think that Question could best be answered in the Antique bottle site. LEON.

P.S. Link below.

http://www.antique-bottles.net/" onclick="window.open(this.href);return false;