including the 2 examples shown in this thread I have info from:

7 Plymouth b-bodies (all Road Runners) with "99" special order paint & 925xxx VONs
All are SPD'd between A23 (Wed. 10/23/68) and C03 (Tue. 12/3/68)
All are from the LA plant
No other 925xxx VON Plymouth b-bodies
3 are "rallye green" and 3 are "Omaha orange" (& one is unknown 9E125300?)

What is the significance of the "16" (roof paint) on the OP's tag (shown prior to repaint in this attachment), even though it is a vinyl top car?

RM21H9E116984 was originally "RALLYE GREEN"

The hardtop RR in the upper right is the green interiored RR tag 69CoronetRT attached. It is "rallye green".