This bottle/vase is about 5.5" high x 4" in diameter and weighs 1.25 lbs. The pontil is a bit unusual. There are some marks etched on the bottom which appear to be initials and a year (L O 73) and maybe a catalog or inventory number (4 73 - 42). The latter could be March 1973, 42nd piece made. Maybe the work of an actual artist, not a student. The "inventory" number could also be part of an inventory system shared by several artists in a studio, hence the relatively large number, 42, or maybe that is not too much for a single artist to produce in a month. All guesses on my part as to what these numbers and letters are and may have meant. Also, note the line in the middle of both number 7s. That is not commonly done in the U.S., so this could be a European piece, although it came from a seller in Kansas, USA. Any thoughts on whether or not this might be European or anything else about it? Thanks!