John Deere resets serial number sequences based on the model configuration (e.g., rigid frame, folding frame, conservation). However, the generally correlates to the specific production era.
John Deere introduced several improvements during the 12-year run, including changes to the Tru-Vee™ opener system and the transition from finger-pickup to vacuum meters in later experimental or upgraded units. John Deere 7000 Planter Serial Number Year Of Manufacture
The actual sequential serial number (which corresponds to a 1984 build date based on the chart above). John Deere resets serial number sequences based on