With an antique weapon, you will need to get a professional appraisal. I have seen weapons in an 'excellent' grading from this manufacturer, in 12 mm, offered for over $1200. But condition and rarity are key. Take it to a gun dealer that sells pre-1900 guns.
Garnier Freres has written: 'Les trois petits cochons'
Centre pedagogique des freres unis was created in 1988.
The cast of Faux freres - 2008 includes: Jo Prestia
Half-brothers.
It was made by Raich Brothers (Freres) of Leige, Belgium.
brothers
The answer to your question is -that will require an appraisal by someone familiar with antique European firearms, and will depend on model and condition. The Jongen Brothers revolver I have seen was an unusual "reverse break" type, hinged at the top, barrel swung up at the rear of cylinder. Have found mention of Jongen in 4 patents on revolvers, believe they were active in Liege Belgium in the mid 1800s.
J'ai deux freres.
In English, "j'ai cinq frères" translates to "I have five brothers."
Deux freres!
It means : How many brothers do you have ?
it means brothers for life