These two abbreviations stand for, respectively, "mint on card" and "mint on mint card." Both are frequently used by toy collectors and dealers to denote toys that remain sealed on their original blister cards. However, the MOC abbreviation is quite vague, since the "mint" part of it refers not to the blister card (the most important part to most collectors), but to whatever is sealed on it--and unopened toys are almost invariably in mint condition. MOMC attempts to clear things up somewhat, but collectors still must realize that these designations refer, first and foremost, to an item's overall state of being carded, and not necessarily to the condition of the card itself.
Description: Ron Salvatore