There is an argument raging about grading standards and who is better at grading Bust Halves, NGC or PCGS, and where does ANACS fit into all of this.
From my own experience I have crossed using the crossover service 5 NGC coins to PCGS, with 2 others failing (one was a real long shot).
1812 O-107 (NGC AU55, bagged for cleaning, tried to cross at a 50 min)
1812 O-105a (NGC AU50 crossed at grade)
1813 O-108a (NGC AU53, great coin but DNC at grade)
1820/19 O-102 (NGC AU53 crossed at grade)
1827 O-120a (NGC AU58 crossed at grade)
1832 O-115 (NGC AU55 crossed at grade)
1833 O-106 (NGC AU58 crossed at grade)
I have cracked out many for crossovers. Usually they are coins that I want a shot at an upgrade when crossing. You never know what the graders will say. My success has varied but a few were major scores.
1806 O-107 NGC VF20 cracked and came back from PCGS as a VF30. I fully expected this one.
1808/7 O-101 NGC XF45 cracked and came back as a PCGS XF45. Was hoping for a 50 on this one and still think it has a shot.
1808 O-104 NGC VF35 cracked and came back as a PCGS XF40. This was the hopeful result as the luster demanded it!
1808 O-107a ANACS VF30 cracked and came back NGC VF35
1810 O-101a NGC XF40 and former ANACS XF45 came back as a PCGS XF40. Was hoping for a 45 but…
1811 O-103 ANACS XF45 cracked and crossed to PCGS as an XF45. As good a 45 as you can get!
1811 O-110a ANACS XF45 cracked and NGC gave it an VF35, cracked and came back as a PCGS XF45 (oof!)
1812 O-107 NGC VF35 cracked and came back as a PCGS VF35 (hoping for a 40)
1813 O-104 NGC VF30 cracked and came back as a PCGS VF30 (hoping for a 35)
1813 O-106a ANACS XF45 cracked and came back NGC 40 then cracked and came back PCGS 45 (really an AU coin!)
1813 O-110 ANACS XF40 cracked and came back NGC 35 then cracked and came back PCGS 40
1814 O-102 ANACS XF40 cracked (spent time in the DANSCO) and came back PCGS XF40
1814 O-103 NGC AU55 cracked due to PVC contamination and has yet to grade again due to QT (X3 PCGS, 1X NGC)
1817 O-105a NGC XF45 cracked and came back PCGS AU53 (was expecting a 50)
1818 O-111 NGC XF 40 cracked and came back PCGS 35, then 30 now NGC 35! Still think its closer to 45
1819 O-104 NGC XF45 cracked and came back PCGS XF40, then resent to PCGS and came back 45 (what a pain!)
1820 O-105 ANACS XF45 cracked and came back XF det cleaned from NGC and yes it is! I tried.
1823 O-103 NGC XF45 cracked and came back PCGS 35. Tried again-same result. Now an NGC 35 (VLDS coin has luster!)
1825 O-103 ANACS XF45 Cracked and came back NGC XF45 (very weak strike, very little wear, heavy tone)
1829 O-103 ANACS XF50 cracked and came back NGC XF45
1836 O-108 ANACS XF45 cracked and came back PCGS VF35 then PCGS regrade service XF40 (which I expected)
So this is my current roster, with hopefully more successes to come.
There is also a recent Heritage auction loaded with Capped Bust Halves where Heritage crossed over all of a collection to NGC (from mainly PCGS and ANACS, but also others such as ICG).
The results I found quite interesting. I noted 14 PCGS coins crossed at grade:
2 XF40 to XF40
2 AU53 to AU53
5 AU55 to AU55
5 AU58 to AU58
There were 4 upgrades
2 AU55 to AU58
1 AU50 to AU53
1 AU53 to AU55
And 4 downgrades
1 AU55 to AU53
1 AU50 to XF45
1 AU58 to AU55
1 AU53 to AU50
There are many others that I was unable to find the previous slab and the ANACS history was roughly the same sort of result.
For those who want a particular grading service this should provide some sort of base line and indication that it is not just all about the coin, but the opinion of the graders at the time of grading!