Just keeping the ball rolling...here is the only known straight graded example (VF30) of the 1875 "Wide CC". Only 3 examples have been found to date despite decades of searching amongst Trade Dollar geeks.
Here are the other three "Wide CCs". I have always found it interesting that the exact same reverse die was used over four different years.
Yeah, they are all tough - the 73 and 74 are very scarce. The 76 is the most common of the bunch and is pretty easy to locate compared to the others...
here's some old pics of one of mine which is the coin (before and after cleaning) shown in this thread https://www.cointalk.com/threads/1876-trade-dollar-get-it-cleaned.276689/
Congrats, cooper, that's a great looking coin! here is one of my 74-cc wide cc's, not sure how I wound up with 2 of them.
Here's my '78-S. Apologies for the photo quality and shadow on the reverse. Cleaned by a prior owner and looks as if was dipped at some point.