Inside case back stamping of the 3570.40 JRD?

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Hi all. Can someone share a photo of the inside case back of a 2004 3570.40 (Japanese racing dial)?

Is it stamped with the single case ref. 145.0022 or the double case reference 145.0022/345.0022?

I am thinking that it is the single case ref, but would like some confirmation.