This doesn't surprise me at all. Despite origin being a well received adaptation of the Original television version of Mobile Suit: Gundam. Its still in printed form which by bandai/sunrise policy makes it an unofficial work, or put its into the grey area of semi official like Blue Destiny. This gives them a bit of wiggle room in placing the mobile suits into the official continuity when they animate these early one year portions of the origin.Kratos wrote:I figured an easy way to "solve" this issue would be to check the official site, and sure enough, they're drawing a distinction. The RTX-65 is labeled as the Guntank Early Model (ガンタンク初期型). So there we have it - it's the Guntank, but an early version of it. Presumably they'll do something similar for the Guncannon.
In a sense its not really a retcon, since these sections were never animated which would of made the placement of the suits official. The OVAs are also an adaptation of an adaptation which is most likely meant to fill in the early blanks of what lead up to the one year war.