1. Existence of the variation is verified by a personal collection.
2. Variation is described in the paperback "Collectible View-Master: An Illustrated Reference and Value Guide" by Brad and Julie Welsch, January 2000
3. Variation is described on the internet site The View-Master Ultimate Reel List that was maintained by and © Keith Baird. This list now only exists on the web archives.
4. Variation was described on the internet site maintained by and © Jeff Wisniewski. Saddly it is offline now. Some of the pictures shown on the "Pictures" pages are from Jeff's collection. They have '(4.)' written at the end of the scene description.
5. Picture of scenes kindly donated by Bjarne Lauder.
6. Picture of scenes kindly donated by Al Woodcock.
7. Picture of reels kindly donated by Alan Baggett.
8. Information kindly provided by Harry zur Kleinsmiede.
9. Picture of reels kindly donated by Bernadette Kriellaars.
10. Variation was described by Roger Nazeley in one of his writings.
11. Information kindly provided by James Hartman.
12. Information kindly provided by Sam White.
14. Picture and information kindly provided by Mark Carron.
15. Picture and information kindly provided by David Goldman.
16. Information kindly provided by Phil Marsh.
17. Pictures and information kindly provided by Rebecca Killbreath.
18. Information kindly provided by Michael Tubbe.
19. Pictures and information kindly provided by Andy Allison.
A lot of additional information on existing reel variations, especially on the Belgian issues, was kindly provided by Rob Gringhuis.
The coding on the variety-o-matic page was written by Tim Lambert.