I have a friend who owns an engraved 1893 with a 14.5" LOP instead of the standard that was about 13 3/8". His gun also is a very early gun made prior to the cataloged engraving and checkering patterns. Prior to the special high grade catalog, Marlin often just put a certain amount of coverage for a set price. No two were identical until the catalog set a standard for certain levels.
The catalog you have is the "Special High Grade Marlin Repeaters" catalog. I have this same catalog in my collection. These catalogs date from the late 1800's to early 1900's, before the change to '93 or '94 designation in 1906.