KU started in 1970. Dual hardwood two tone riser 1970-72. No stabilizer bushing 1970. Stabilizer bushing with Kodiak Magnum silkscreen on back 1971. Belly 1972. Green futurewood riser white handle overlay 1973-75. Green futurewood with futurewood riser overlay 1976-77. KM serial number started sometime in 1977 I believe.