Welcome Joanne to the wonderful world of collecting Harbour Lights!! And welcome to the Collector Forums!
Fire Island is one of seven issues that started off life as a GLOW (open edition) but was changed to a limited edtion (9,500) because we collectors didn't like the idea of HL issuing a lighthouse as an open when it was never a limited.
That's the reason Fire Island doesn't have an edition size on the flag. As a GLOW it had a 400 series product number. When it was switched, it was given the product number 176. And eventually another lighthouse was given the 406 product number.
You can learn more about this switch from GLOW to Limited at this page:
www.harbourlights.com/modifications/pages/open2limited.htm I don't think there is any secondary market difference in value to these pieces either as GLOW or limited. In general an 'error' that can be duplicated by a collector (i.e. put a different sticker on the bottom/box) is not going to appreciate.
Haven't heard of a Nobska label on a Presque Isle before, but all it would take to duplicate would be to call HL and ask for a Nobska label and do-it-yourself.
John
P.S. This topic was covered some days ago. You can read the responses at:
http://www.lighthousekeepers.com/forums/Forum1/HTML/000242.html Dont' forget you can always "SEARCH" the forums for other postings about your topic.
[This message has been edited by JChidester (edited 03-23-99).]