jan 1, 73 - The Principality of Zeon completes the first prototype mobile suit, the MS-01

Description:

The ZI-XA3 Crabman , also designated as the MS-01, is a mobile suit appearing in the Mobile Suit Gundam MSV-R Legend of the Universal Century Heroes: The Fabulous Shin Matsunaga manga.
The "MS" model number was taken from "Mobile SUIT". With it receiving the designation MS-01, the Ministry of Defense ordered the development of a combat type disguised as a new type of space work machine

Added to timeline:

Date: