862 was used for model year 68, and early production 69
890 was used after that for 69 and model year 1970.
Really not much difference between the 862 and 890.
Usually the 862's are "white" plastic, but I have seen many 862's with the black plastic too.
They both have the key warning function
The 890's are always black plastic....
the part number is stamped on the mounting bracket for these 2 particular relays.