Ranking and Grading

In the Tower weapons, Inventory-Items, Wands, Pockets, Lighthouses, Mobiles and even the different kind of skills mastered by Rankers and Regulars are all given ranks according to their level.

We do not yet know who or how these ranks are given.

The Levels of Ranks
The ranking system goes from SS+ as the highest and down to F10 as the lowest. The scaling goes as following:

'''SS+ > S+ > S1 > S2 > ... > S10 > A1 > ... > A10 > B1 > ... > B10 > C1 > ... >C10 > D1 > ...> D10 > E1 > ... > E10 > F1 > ... > F10'''

Known Examples of Ranked Weapons

 * White Oar the only S+ Rank weapon in the Tower (it is a sword)
 * Golden November a S-Rank weapon (weapon type unknown).
 * Black March a A-Rank Needle ( w hen ignited).
 * Mago a B-rank Spear (w hen decompressed).
 * Narumada a 7D-Rank Sword.

Notes and Trivia
Notice that it not seems as if the normal numeric system is used for S or higher rank weapons. Maybe because their are so few S or higher rank weapons.