The default barrier jacket of Fate Testarossa used from Mahou Shoujo Lyrical Nanoha The Movie 1st to 2nd A's until upgrade.
It is similar to the original form and Lightning Form. The main features are her Thighhighs with non-flat tops and layers, gloves without armor, and the connection of the straps on her body turning into golden squares, etc.
Can use Lightning Form if the features are not obvious and difficult to distinguish.