16mo, staple bound softcover pamphlet, 48pp. Ostensible later printing. Pages age toned, yet crisp and clean. Wrappers in excellent condition. A pocket guide for altar boys on the rubrics of serving a low mass according to the Tridentine missal. “Containing a pictured explanation of the vestments, altar and sanctuary appointments, together with an interlinear phonetic arrangement of the Latin prayers.” An excellent copy.