Source: http://www.sera.de.License: All Rights Reserved.
Established in 1970, "sera has been manufacturing innovative high quality products for aquariums, ponds and terrariums for over 40 years, and is one of the most important manufacturers in these ranges worldwide." — sera.de
The logo uses — a possibly slightly customized —Churchward DesignBold (also known as Churchward Galaxy). "Churchward Design 70 (1970), a seemingly Bauhaus-influenced typeface (though Churchward denies any outside influences on his work), has a family of no less than 72 variants. Where the Bauhaus would have probably settled with one version, all lower case, Churchward Design 70 was the starting point for a varied agglomeration, suggesting infinite possibilities and amalgamations derived from a single skeleton. It includes bolds, ultra-bolds, italics, metallics, hairlines, outlines, multi-lines, shadows (morning/evening), shadow-outlines, chisels, 'mystic' shadows, 'sparkly', no-end, and on the list continues …" — David Bennewith in his monograph on Joseph Churchward, 2009.