Nothing there but Die Deterioration. Your pictures are pretty hazy but I am picking up what looks like a F'S-901 reverse die variety 006. Its worth jumping on coppercoins.com for a comparison look. If it is a RDV006 you got a rare one. Could be the pics but the initials appear flared? Let us know or send a close up of the initials. The 1988 D DDO is a tough one to locate but the 88 D RRDV006is even tougher. Good luck.
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