Study of 1875-CC trade dollars type I/II die marriages

I was impressed with last month's thread "A study of the 1876 Trade Dollar Type 2/Type 2 Die Marriages", and I wanted to know if anyone has definitively examined the scarce '75-CC I/II trade dollar as well.
Relying on Breen is leaning on a thin reed indeed, so I take his claim that 20,000 were minted in December of 1875 with a pillar of salt. It's quite possible-- I just haven't seen the proof. Over the years I found two distinct type II reverses for the '75-CC, but I never looked for different obverses. The easiest way I distinguished the reverse dies was to look for a die scratch through the "F" in UNITED STATES OF AMERICA. One had it, and the other didn't. I haven't looked at the coins in so long I don't remember the mintmark positions or anything else that stood out. The only way I could identify the mintmark on one of my chopped 1875-dated trade dollars was to identify the crossed F. Without that indicator I would have guessed it was probably the far more common '75-S.
Has anone checked to see how many obverses were used?
Has anyone identified more than two reverse dies?
Relying on Breen is leaning on a thin reed indeed, so I take his claim that 20,000 were minted in December of 1875 with a pillar of salt. It's quite possible-- I just haven't seen the proof. Over the years I found two distinct type II reverses for the '75-CC, but I never looked for different obverses. The easiest way I distinguished the reverse dies was to look for a die scratch through the "F" in UNITED STATES OF AMERICA. One had it, and the other didn't. I haven't looked at the coins in so long I don't remember the mintmark positions or anything else that stood out. The only way I could identify the mintmark on one of my chopped 1875-dated trade dollars was to identify the crossed F. Without that indicator I would have guessed it was probably the far more common '75-S.
Has anone checked to see how many obverses were used?
Has anyone identified more than two reverse dies?

Obscurum per obscurius
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Save your time. Two Reverses known....both married to the same obverse die. I can send you images if you would like to post them. They are close to one another but different.
keoj
Complete Set of Chopmarked Trade Dollars
Carson City Silver Dollars Complete 1870-1893http://www.pcgs.com/setregistry/showcase.aspx?sc=2722"
Any others want to guess at the original mintage figures for the type II?
Breen says 20,000.
Crypto says 80,000 to 100,000.
Obscurum per obscurius
As for mintage, using the low mintage of the 73cc as a guide I would say I see about as many (or just a tad less)75cc type 1/2s on the market. Further more I see about 1 out of 10 total of 75cc have the type 2 rev although most high grade are the type 1.
Using those as lose guides
The 1.6m mintage of the 75cc would line it up with the 73cc which is 124k if the 10% (type one to type two) guess holds up
Two know rev lends its self to a more conservative 125-150 mintage with normal population loss factors making up the differences esp considering they were clearly used and exported at a high rate
The one obv die lends its self to a mintage if really not more than 80-100k (max die life) but most likely less.
The notion that the 75cc 1/2 was the great rarity of the hub series was something I think was popularized by jack bymer as he lead the way in popularizing the style of collecting. As far as I can tell the 75cc is the fourth hardest to come by hub variant
With a mintage of 1,573,700, that would mean that about 250,000 with the Type II reverse were struck.
Bowers estimates a survival number of 4,000-8,000, so that would give us about 640-1280 surviving.
Complete Set of Chopmarked Trade Dollars
Carson City Silver Dollars Complete 1870-1893http://www.pcgs.com/setregistry/showcase.aspx?sc=2722"
judging by extending the right side of the D upward.
Or by drawing a line on the right side of the C and seeing how close it is to the comma.
<< <i>Based on some research I did a while back, I found that the percentage breakdown of Type I reverses to Type II reverses was 84 percent to 16 percent, or roughly 6:1.
With a mintage of 1,573,700, that would mean that about 250,000 with the Type II reverse were struck.
Bowers estimates a survival number of 4,000-8,000, so that would give us about 640-1280 surviving. >>
I think with the import/export nature of the issue it's hard to directly correlate manufacturing runs vs survivorship. Considering how many went to china and suffered higher levels of attrition then followed by the recalls domestically later on, who knows. I do see mostly type 1s chop marks for what that's worth although there are type 2s out there with chops. I do not see a mintage of 250k supported with only one obv die used.
For my study, I looked at appearances in major auctions and eBay of 75-CC Trade dollars (and other dates) as well. I only counted them if they were in reputable TPG slabs, i.e. raw coins on eBay I ignored. I am not sure how many years I went back, but I counted 126 market appearances of 1875-CC Trade dollars over the past several years. Of the 126, 106 were I/I (84.1 percent); 20 were I/II (15.9).
Of the 106 I/Is, 10 were chopped. Of the 20 I/IIs, 0 were chopped. That's not to say I/II Trade dollars don't exist chopped, I have one.
Whatever the actual production/survivorship numbers are, the main point is that 75-CC I/II Trade dollars are probably not as rare as many people think.
Complete Set of Chopmarked Trade Dollars
Carson City Silver Dollars Complete 1870-1893http://www.pcgs.com/setregistry/showcase.aspx?sc=2722"
Complete Set of Chopmarked Trade Dollars
Carson City Silver Dollars Complete 1870-1893http://www.pcgs.com/setregistry/showcase.aspx?sc=2722"
With respect to where I got my 1:20 range, it was based on a 2000 coin coin study of non-problem coins.
keoj
Great work!!!