Besson New Creation
That trumpet is worth whatever anyone will pay for it. A good, used 2-20 might go for around $100, but one in rough shape might go for $25 or $30.
1978
This question really can't be answered without seeing the trumpet in person. A trumpet's value depends on its condition and playability. Your best bet would be to have it appraised. Depending on the age of the trumpet, it could be worth anywhere from $500-$1,500, but there is no way to tell without seeing it. Also, you would need to know what kind of Bach trumpet. If it's a Stradivarius, it will be worth more than a student model.
They're around 8-12 pounds depending on the model and brand of the instrument. For example a Besson Prestige weighs 10.3 pounds where as a Besson Sovereign weighs 9.4 pounds. See related link for specifications.
Besson New Creation
The company that developed the valved trumpet in the 19th century was known as the "Besson" company, founded by the French instrument maker Gustave Besson. The valved trumpet gained popularity during this time due to its enhanced range and versatility. While other makers contributed to its development, Besson is often credited with significant advancements in brass instrument design.
That trumpet is worth whatever anyone will pay for it. A good, used 2-20 might go for around $100, but one in rough shape might go for $25 or $30.
Benno Besson's birth name is Ren-Benjamin Besson.
Francis Besson's birth name is Francis Michel Besson.
Tony Besson's birth name is Tony Lee Besson.
William Besson was born in France.
Luc Besson is 173 cm.
Pierre Besson is 181 cm.
Albert Besson was born in 1896.
Albert Besson died in 1965.
George Besson died in 1971.