A badge narrows a window. It never fixes a year, and it is the single easiest component on a drum to replace. Each entry below states what is documented, what merely fits the pattern, and where the claim comes from.
Thin adhesive foil badge, blue and silver, carrying the new Tama wordmark on tooling inherited from the Star era.
Rectangular metal badge, black field with gold lettering, fixed with rivets or pins through the vent hole area.
Oval badge naming the series directly, chrome or gold-toned depending on the finish package.
Modern Tama badging on drums built long after the original run, in different factories and materials.
Supported by a dated primary source — a catalogue, price list, or period advertisement.
Matches the pattern seen across surveyed examples, but no dated primary source fixes it.
Commonly encountered as a later change, a parts swap, or a kit assembled from several drums.
Repeated widely in the collector community without a source we can point to. Treat with care.