А что такое XF? четкого определения данной степени сохранности нет. Нельзя сказать, что эта монета в состоянии XF, а эта- нет. Все как говорится "диалектично". Поживем- увидим.! 
Здрасьте, приехали!))) Как же нет??? а это вот:
http://en.wikipedia.org/wiki/Coin_gradingили:
PO-1 Identifiable date and type
FR-2 Mostly worn, though some detail is visible
AG-3 Worn rims but most lettering is readable though worn
G-4 Slightly worn rims, flat detail, peripheral lettering nearly full
G-6 Rims complete with flat detail, peripheral lettering full
VG-8 Design worn with slight detail
VG-10 Design worn with slight detail, slightly clearer
F-12 Some deeply recessed areas with detail, all lettering sharp
F-15 Slightly more detail in the recessed areas, all lettering sharp
VF-20 Some definition of detail, all lettering full and sharp
VF-25 Slightly more definition in the detail and lettering
VF-30 Almost complete detail with flat areas
VF-35 Detail is complete but worn with high points flat
EF-40 Detail is complete with most high points slightly flat
EF-45 Detail is complete with some high points flat
EF-45+ Detail is complete with a few high points flat. Superior eye appeal.AU-50 Full detail with friction over most of the surface, slight flatness on high points
AU-50+ Full detail with friction over most of the surface, very slight flatness on high points. Good eye appeal.
AU-53 Full detail with friction over 1/2 or more of surface, very slight flatness on high points
AU-53+ Full detail with friction on only 1/2 of surface, extremely slight flatness on high points. Positive eye appeal.
AU-55 Full detail with friction on less than 1/2 surface, mainly on high points
AU-55+ Full detail with slight friction on less than 1/2 of surface, on high points. Eye appeal is good.
AU-58 Full detail with only slight friction on the high points
AU-58+ Full detail with the barest trace of friction on the highest points. Superior eye appeal.
MS/PR-60 No wear. May have many heavy marks/hairlines, strike may not be full
MS/PR-61 No wear. Multiple heavy marks/hairlines, strike may not be full
MS/PR-62 No wear. Slightly less marks/hairlines, strike may not be full
MS/PR-62+ No wear. Still slightly above number of marks/hairlines, strike may not be full. Attractive eye appeal for grade.
MS/PR-63 Moderate number/size marks/hairlines, strike may not be full
MS/PR-63+ Average number of marks/hairlines, strike will be close to average. Good eye appeal for grade.
MS/PR-64 Few marks/hairlines or a couple of severe ones, strike should be average or above
MS/PR-64+ Very few marks/hairlines or a couple of heavier ones, strike should be average or above. Superior eye appeal.
MS/PR-65 Minor marks/hairlines though none in focal areas, above average strike
MS/PR-65+ Very minor marks/hairlines though none in focal areas, above average strike and eye appeal
MS/PR-66 Few minor marks/hairlines not in focal areas, good strike
MS/PR-66+ Very few minor marks/hairlines not in focal areas, very good strike with superior eye appeal
MS/PR-67 Virtually as struck with minor imperfections, very well struck
MS/PR-67+ Virtually as struck with very minor imperfections, very well struck with attractive eye appeal
MS/PR-68 Virtually as struck with slight imperfections, slightest weakness of strike allowed
MS/PR-68+ Virtually as struck with very slight imperfections, the strike must be virtually full. Eye appeal must be very good.
MS/PR-69 Virtually as struck with minuscule imperfections, near full strike necessary
MS/PR-70 As struck, with full strike
