Question about a Britannia Proof Slab

All of the Britannia proofs that I have seen are usually graded as PR69DCAM or PR68DCAM.
When I got two 2008 Britannia proofs back from PCGS, they were graded PR69RD DCAM.
What does the RD mean?
When I got two 2008 Britannia proofs back from PCGS, they were graded PR69RD DCAM.
What does the RD mean?
PCGS Currency: HOF 2013, Best Low Ball Set 2009-2014, 2016, 2018. Appreciation Award 2015, Best Showcase 2018, Numerous others.
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Comments
I give away money. I collect money.
I don’t love money . I do love the Lord God.
edit: nevermind, I'm wrong a two pence would be 2d. DUH!
Life member #369 of the Royal Canadian Numismatic Association
Member of Canadian Association of Token Collectors
Collector of:
Canadian coins and pre-confederation tokens
Darkside proof/mint sets dated 1960
My Ebay
Well, just Love coins, period.
yup, someone was drinking on the job.