...an ebay listing of the item gave the height as 13.5cm or thereabouts. That is small for a piece of Sam Herman art glass, even in the mid-1970s.
It is the exception that proves the rule, they say. When I made the comparison in Reply #1, perhaps I should have said
most Sam Herman works from the 1970s onward are larger than Greg's Jam Factory piece. The delightful little bottle in the photos below is a shade under 12cm high and 7cm in diameter. There is no doubting its parentage, with its inscription "Samuel J. Herman 1977 SA1366". It was originally purchased at a Jam Factory exhibition in early 1977, where many of the items were already sold before the exhibition opened, thus leaving the original purchaser little choice.
As I said earlier, Greg's piece was more likely made by one (or more) of the trainees as a Jam Factory production item. I have found some clues as to which of them made it, or at least who had the dominant role in making it. I can't reveal all just yet, because I have some more evidence to collect and I may need to obtain permissions for the use of photos to illustrate the connections.
In the meantime, enjoy this Sam Herman miniature.
Trevor