Abstract: The invention relates to the field of labeling machines for bottles provided with a reference recess (13) on the bottle base, which recess (13) can be used to effect the centering of the labels on the bottle: more precisely the invention relates to a bottle-bearing plate, comprising an internal body (3) which can slide vertically and rotate about its own axis, and which is non-contactingly surrounded by an external body (2) which can be engaged and raised by the internal body (3) after an initial non-contacting upward-moving rotation. A centering ring (4) is fixed to the external body (2), which ring (4) perfectly reproduces the the external surface curvature of the bottle at its base. A centering device (5), destined to insert into the reference recess (13), is fixed to the internal body (3).