2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/167487We use a generalised Kummer construction to realise all but one known weight four newforms with complex multiplication and rational Fourier coefficients in smooth Calabi-Yau threefolds defined over the rational numbers. The Calabi-Yau manifolds are smooth models of quotients of the Weil restrictions of elliptic curves with CM of class number three.12 pages; v2: added references, minor changesAlgebraic GeometryNumber Theory14G10, 14J32, 11G40text