Slinger/Leedy era: No badges on Leedy toms '61 - mid '66. Badges appear on toms before '61 and after mid year '66. (per Slingerland historian Dr. Wenk)
To be clear the above applies ONLY to Leedy toms (under Slingerland ownership). Slingerland toms are a different story: No badges on Slingerland toms till mid '66.