How to sew a Waistband with Concealed Seam (the stitch is almost invisible)

How to sew a waistband with concealed seam (the stitch is almost invisible).

No stitch on the waistband in the face side(not inside).
Stitch on the edge between the waistband and the bodice.
Top-stitch on the lower of the waistband inside.

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BGM composition : Button hole craftman

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Paris collection, Tokyo collection etc… Sample garment factory Atelier Saison.
We have sewed at Shibuya-ku, Jingumae in Tokyo for more than 35 years.