Thanks GrapeCollects -- can I ask (to learn) what distinguishing marks helped you make that assessment?
No problem (prepare for an essay).
Coin #1: 1875 20c
The coin, as NGC
indicated, retains an XF amount of detail, however the coin appears to display very shiny surfaces, an attempt to imitate natural mint luster. The replicated "luster" is very matte and flat with, as indicated by above posters, no cartwheel to it. Also, an XF coin, generally speaking, will have little to no mint luster remaining, that should be a red flag on its own going forward. In addition, a collection of hairlines left by an abrasive cleaning can be seen in the right obverse field by the cap.
Coin #2: Lafayette Dollar
The cleaning in not as harsh as the previous coin, and generally has good eye appeal, however, from around K3 in the obverse field to K6 hairlines going N->S can be seen. While it is quite minor, it appears that whoever cleaned the coin may have been attempting to remove a stain or spot.
Coin #3: 1904-S Morgan
This coin, as designated by NGC
, is high AU in terms of the remaining detail, however, as I previously described in the first coin, the luster is unnatural, shows no cartwheel, and is matte and flat. While generally some hairlines are present on AU quality coins as many Choice AU coins are "mishandled Uncs" the pattern of hairlines is much too consistent in their grouping and quantity to be natural.
Coin #4: 1932-S Washington quarter
Much similar to my speculation regarding the Lafayette Dollar, the cleaning on this coin was likely with the intent to remove spotting. The color on this coin is inconsistent and while residual mint luster is visible and present, largely the luster seems flat and unnatural, though to a significantly less degree than some of the previous coins. Also, while I cannot be sure without seeing the coin in hand, there appear to be hairlines from K2 to K4 heading W->E in the right obverse field.
Coin #5: 1886 Morgan dollar
See comments on Coin #3. I will say, the cleaning is SIGNIFIGANTLY, more minor on this coin. I'd also state I think that the coin may actually be an UNC Details coin rather than AU.
Coin #6: 1884 Morgan dollar
See Coin #3. I'd also add a scratched comment for the scratch running from the rim to hair by the 'U' of 'PLURIBUS'.
Coin #7: 1875-S Trade
Significant hairlines cover the obverse and what appears to be a large scratch are significant issues. In addition, significant staining borderlines environmental damage.
Coin #8: 1878 Trade
See coin #3 generally speaking. Surfaces are too bright for the grade.
Coin #9: 1875-S 20c
Harshly cleaned. Coin is extremely bright with matte and unnatural surfaces.
Coin #10: Lafayette Dollar
See coin #2. Generally the same, but to a significantly more severe degree.
Coin #11: 1932-S 25c
Coin is a technical XF with extensive hairlines and unnaturally bright and unnatural surfaces. Harshly cleaned with an abrasive.
Coin #12: 1884-S Morgan
See coin #3
Coin #13: 1860-S 50c
Harshly cleaned AU-50/3. Extensive hairlines are visible in the right obverse field that cross over the devices and into the left obverse fields.