Tachometer assembly with RED needle. Tractors: Gas/Diesel with Powershift transmission:4020 (to s/n 250000)Red needle used through 1968. No provision for fiber optc light.Fits John Deere models 4000, 4020, 4520, 4620, 600 Indust/ConstReplaces AR32827 AR39902 AR45445 AR48022 AR50403 AR50407 RE206857
