According to Liche in his video The incredible early screens of DOFUS #1 (2003-2004), beta v1 was released on October 15, 2003. You can see a screenshot from this version with an Iop; on the map, the map-change tiles are not suns but gray and white tiles (source). You can also notice the Iop's hairstyle: the character's model has short hair, while the medallion image seems to have long hair — the Iop's hairstyle will change several times up to Dofus 1.13 (short hair / spiked hair). There seems to be only one chat channel, and there are no smileys. The interface had 2 buttons: one for spells and another for inventory and characteristics. Access to combat was through steles that opened an interface allowing PvP fights; the fights took place on maps separate from the rest of the world, similar to the Koli maps of the latest Dofus 2 versions. This interface also gave access to the friends list.
Characters' weapons were visible, and each character could only equip a single weapon type (for example, swords for Iops, staffs for Fecas). It should also be noted that there is no MP in the earliest beta versions — movement is handled with AP, 1 AP = 1 tile of movement, and melee attacks cost a fixed amount of AP. Finally, it seems that in this version all the classes (the first 10) were graphically ready, but some were not playable.