I have coins that have been graded by both
I also have coins that have been graded by CGS and then those same coins cross graded by ANACS
I will post up a comparison of the cross grades in a sales thread, and I would be selling both CGS graded coins, and the cross graded coins (plus some coins just graded by ANACS). Be interesting to see what the market makes of them.
CGS have their own grading system which ranges from 1 to 100. Doesn't that make comparisons with ANACS difficult?
Their website says: "Surprisingly there is no universally accepted bench mark standards for the grading of English coins, by this we mean there is no universally recognized independent publication giving bench marks for the grading of English coins. The broad terms in use (see below) Very Good, Fine, Very Fine, Extremely Fine, and Uncirculated although broadly consistent in the main body of the professional UK dealer and bigger auction houses, are subject to the individual “subjective” opinion of the grader at the time based on his experiences and paradigms. To our knowledge no one refers to any accepted universal guide (as none exists) or retains sets of coins to refer to for consistencies sake. How then has grading been done? Basically the grader looked at a coin and decided based on his experience and memory what grade it is, if he is not sure then a plethora of middle grade attachments and riders are introduced such as about Uncirculated, near to Very Fine, approaching EF, better than Fine, Good Very Fine, BU, Gem, Choice we could go on it seems almost endlessly. The CGS UK system arrives at a numeric grade between 1 and 100 with 100 being absolute perfection. It is not our intention to replace the traditional grading terminology (listed below) but it can easily be argued that once a numerical grade is attached the need for some additional narrative description is superfluous. However CGS UK numerical system will broadly translate as follows."
They then have a table which compares their grades and Sheldon grades.
This is the result of the 4 coin cross grading I did. It is exactly because ANACS has a 70 scale, and CGS has a 100 scale, that I felt it needed to be done to try and have some yard stick to draw a comparison from (and as we know even between grading orgs that use the 70 scale, they still differ between them)
Coin manufacturer BTC face value Manuf. Date Series Metal Coin Public key CGS Grade CGS Reference ANACS Grade ANACS Reference
Casascius 0.1 2013 3 Silver 1AgzMWdZ 96 34734 68 4908286
Casascius 0.1 2013 3 Silver 1AgzZrqz 97 33409 68 4908287
Casascius 0.1 2013 3 Silver 1AgzAJSA 97 34735 68 4908285
Casascius 0.1 2013 3 Silver 1AgzNtiP 98 34737 69 4908284
I will get this sales thread up over the weekend, or early next week. I have pics of each coin before in the CGS slabs, and after in the ANACS slabs. Just need to get the time to organise everything so that it can be displayed and interpreted
Effectively what the table says is that the equivalent grades, on this sample of 4 coins were
CGS Grade ANACS Grade
96 68
97 68
97 68
98 69
Obviously isnt gonna be an exact transposition each time, but it certainly shines some light on it