According to Marco Fernández-Sommerau on page 34 of Messerschmitt Bf 109 Recognition Manual* the following batch of Werknummern 2189-2264 was part of the Dora production run.
Hope this answers your question.
* Published by Classic/Ian Allan
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Ruy Horta
12 O'Clock High!
And now I see with eye serene
The very pulse of the machine;
A being breathing thoughtful breath,
A traveller between life and death;
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