From:
Glenn Poch's Bottle Collecting Newsletter 2
March 1, 1995
http://www.antiquebottles.com/poch/2.htmlCOLLECTORS BEWARE OF THE FOLLOWING BOTTLES:
Dutch Onion Bottles (olive-green) short squat wine bottles, usually made
between 1650-1750 with pontil. These are now being reproduced, they look
new, any bottle in pristine condition beware of, I hear they are pretty
good reproductions.
Fruit Jars: plain jars are being color "inhanced" by Gamma Ray's -
turning ordinary ball jars in aqua $2 to blue jars $200+, this is being
done by a person who labels them color enhanced but these labels are
usually removed. The colors all vary -as they don't know what color
the jars will turn out when finsihed. These are extremely difficult to
tell since they were orginal old jars, best advice: if the color just
dosn't look right and the price is too cheap beware.