I did not know this artist, but 4 aspects of the signature may be notable anyway:
- The signature was not set into the wet paint and seems to be of a later date than the painting; its colour and material poorly merge with the image. - The name is readable in several ways, of which 'Eder' is not the likeliest. - Googling Hans Eder you'll find he seldom fully signs, but usually in monogram with the year. - The 'H' is not consistent with the Fraktur-script capital in his normal monogram, with the exception of the painting very similar to yours auctioned twice by Dr.Fischer Heilbronn and left unsold: which may have been the same mistaken attribution as yours.