There are 10 different varieties of these holders
Redfield
Black with no grade, black with MS 60 grade, black with MS 60 grade changed to 63 with blue labeling tape, red with MS 65 grade Paramount International Coin Corp extends all the way across the insert, red with MS 65 grade Paramount International Coin Corp is smaller font ending about 1/2 inch from either edge of insert, red with MS 65 grade changed to 67 with red labeling tape, green with MS65+ grade
Non-Redfield
Black with MS 60 grade, red with MS 65 grade, green with MS 65+ grade
The two Redfield types with the labeling tape altered grades were altered on the insert BEFORE the slabs were sonically sealed. so they were done by Paramount not an after market alteration.
The green inserts are probably the most difficult ones to locate followed by the ones with the altered grades, then the red one with the smaller font Paramount etc.
The only variation I have not seen is a non Redfield with no grade because that holder would just say "US SILVER DOLLAR PARAMOUNT INTERNATIONAL etc"