An illustration from the <a href="https://en.wikisource.org/wiki/Encyclopaedia_Biblica" class="extiw" title="wikisource:Encyclopaedia Biblica">Encyclopaedia Biblica</a>, a 1903 publication which is now in the public domain.
<p>Fig. 21 for article "Music". 
</p>
Image of a Babylonian Harp - which had only 5 strings.
no idea - see source
1903
An illustration from the <a href="https://en.wikisource.org/wiki/Encyclopaedia_Biblica" class="extiw" title="wikisource:Encyclopaedia Biblica">Encyclopaedia Biblica</a>, a 1903 publication which is now in the public domain