It is 1/56
I use SLS printing for most of my masters, and it results in a grainy texture. It can be cleaned up by careful buffing, painting the master and giving it a gloss varnish (these were not done in this case, but will be when I receive the redesigned and reprinted masters).
SLS printing allows the same level of detail on all faces. The other main method of printing (FDM) can give a smoother finish, and achieve higher detail, but only on the upper faces. With FDM the underside of the master and any undercuts suffer from (often horrific) scarring from the support material. SLS does not use support material as they literally shoot lasers into a box of Nylon dust.