As always, we LOVE to see pics, in this case a pic of the badge!
To my opinion, the timeline of MIJ kits starts in the early 60's. It appears that before this date there were MIJ drums on the market, but never with a badge on it. So it'll be rather difficult to put such drums (... if any are still existing ...) into the correctly dated time and to the right manufacturer.
There also existed a 'Tempo' badge for kits made by Star (please refer to my website), not to be mixed with the list of your stencils.
Ralf