I moved your post from the PLAY ROOM Forum.
Welcome 'Sis' - Glad you joined us in the forums.
The 'revised' refers to several of the GLOW (Great Lighthouses of the World) series. These are 'open-editions' meaning they are not limited.
Harbour Lights wasn't happy with the look of some of the sculptures when they came out and went back and resculpted them. The ones available now are 'revised' from the original.
Most of these revisions (maybe all) were made in 1997. If you go to the 1997 Catalog page at
www.harbourlights.com/catalog/1997/ and scroll down, you'll see links to Portland Head, Southeast Block Island, and Boston Harbor. Click on the SE Block Island link and scroll down and you'll see some comparison shots that show the original version and the revised version as well as the limited edition.
Sorry the other two don't show the comparison shots. My fault.