A friend of mine has a number of glass flasks that he dug up from the dirt floor of a barn in Lancaster Pennsylvania in the late 1960's. They appear similar to "strap side" flasks, but the are not strap side, although they do have a very pronounced mold seam. They are approximately 5 inches tall, 3 inches wide and 1 1/2 inches thick. Most curious is the embossing on the them, only the number "1928" and nothing else. The are a beautiful apple green color. I was told from another source that they are Clevenger reproductions. Any info provide is much appreciated.