Spectral comparison between our merger model and various Ca-rich transient candidates (Perets et al. 2010; Kasliwal et al. 2012; Valenti et al. 2014; Shivvers et al. 2019). The prominent calcium feature (green marking) and the poorly reproduced Na-I/He-I feature (red marking) can be seen. It should be noted that these markings do not indicate the precise location of the respective features, but rather serve as a guide for the eye. All data are from WISeREP (Yaron & Gal-Yam 2012). Left: spectra around peak magnitude. Right: spectra ∼20 days after peak magnitude.