1966 is correct, but I have a Modern Solo Outfit stamped March 1966 on the floor tom, and all toms have the copper script badge.
Yes, I have notes on your kit (from a previous thread) as there are some interesting anomalies.
The 8x12 rack tom has a serial number consistent with a late '66/early '67 build date. The 9x13 rack tom has a serial consistent with a '67 build date. Neither of these drums has a date stamp. Both toms have the "weak milk chocolate" stain which Dr CJ Wenk says started in Oct. '66. It makes sense that these two toms have badges as indications are that these are post June '66 drums.
The 16x16 floor tom is puzzling. It has a date stamp of March '66 yet the serial number is one which is normally associated with '65.
Even more strange is that this drum also has the "weak chocolate milk" stain which didn't start until Oct. '66. Slingerland date stamped the shells when they were formed. Wrapping and assembly occurred later. Is it possible a March '66 shell was not assembled until June or even October of '66? Sure. Is it possible a '66 drum could have a serial normally associated with '65? Yes.