2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/210819A knot in S^3 is said to have crosscap number two if it bounds a once-punctured Klein bottle but not a Moebius band. In this paper we give a method of constructing crosscap number two hyperbolic (1,2)-knots with tunnel number one which are neither 2-bridge nor (1,1)-knots. An explicit infinite family of such knots is discussed in detail.31 pages, 11 figures. To appear in Topology and its Applications (2008)Geometric Topology57M25 (Primary), 57N10 (Secondary)text