I saved this quarter years ago when my first daughter was born. Was looking at a video about 83 quarters and decided to check mine. Not only is my 83 in great shape I believe it has A DDO on obverse final T in TRUST. Any opinions or advice would be appreciated.
This is my amateur opinion. To my knowledge, double dyes are present on the entire side of the coin, not just one part. They make a dizzy looking effect (When it's more clear, they're often worth more too). Double dyes are consistent in shape accross the whole side of the coin (eg. The same amount of 'spread' over the T would be the same length of spread on all the features of the coin on that side).
Though I believe what you have is known as machine doubling (Not double dye). I have quarters from 1982 that have the same attributes. It's not uncommon to see these effects in U.S coins (In my experience). Coins around this time appear to have more 'leaky' lettering. They're likely to be the coins sold as 'mispellings' of the phase "In God We Trust".
Apart from that, it looks average to me. The coins I have aren't major errors, though they're more leaky (to the edges) and have thicker cud layers (Cud being what you're seeing over the T).
My knowledge is only based from basic forensic skills from schooling and my one year obsession with coins. (I'll definitely be around with more accurate advice once I understand the process of how coins are made - It's usually fundamental to know how anything is made for forensic inspection)
To conclude, my opinion is that this isn't double dye and this is fairly common machine doubling. The cud around the letterings is normal for coins around this time.
