Help with a French gold maker

[asheland]

I am trying to research this piece for a friend.
It's 18K and French but I cannot find this maker's mark.
Can anyone help?





And here's the box:

[asheland]

I believe this maker is Leon Tournan. Can anyone confirm this? Does anyone have a picture of his mark? Or any biography information?

Thanks!

[asheland]

I'm also finding works by Louis Tronquoy. Is this possibly the maker?

[Zilver2]

Hi,

This is the mark of Louis Théodore.
Symbol : a theorbo, musical instrument (un théorbe)
La bijouterie fantaisie en doublé
1)2) 101 rue Saint Louis (Marais)
mark entered 1) : 2 April 1858
mark entered 2) : 16 November 1860
Mark cancelled 2) : 7 September 1864
N° de garantie : 6415; 6820
N° de préfecture : 6603; 7015

regards

[asheland]

Thank you! :)

[amena]

Hi Zilver2
may I ask you for clarification
La bijouterie fantaisie en doublé
As far as I know it should mean: Fancy jewelery in plated metal.
Why there is the hallmark of Hippocrates, for the solid gold?
Thank for attention
Amena

[Zilver2]

Hi,

This silversmith had also had a mark for silverplate.
Hope this helps.

Regards