ZTF long-term (left) in g and r filters and the DBSP optical spectrum of 2CXO J143435.3+334049 (right). The gray lines represent the Keck Telluric Line List. The optical spectrum shows WD Balmer absorption lines with no sign of the donor signature in the optical spectrum and double-peaked, asymmetric Hα and Hβ emission lines. There is no detection of the high-excitation He II 4686Å emission line providing an upper limit for a line ratio He II/Hβ < 0.15 (see Table B.2). X-ray and optical properties suggest that the object is a low accretion rate CV (WZ Sge type; see Sect. B.2 for more details).