A new 100 Shiki (Delta Plus; the grey one in 2nd pic) revealed in recent Gundam Ace. Besides, the Delta Gundam is revealed in Gundam Fix section too.
The Delta Gundam might be the original concept design of 100 Shiki. The Book, released for 1 year, presented an interesting conspiracy story that a MS fanatic (an ex-Anahiem staff) got these secret files & revealed the origin of so called Delta Gundam project. Is it a ture or just the imagination of the MS fans?
Netfriend xiaolw from nwbbs provides full scan of this book! :)