Lieutenant Commander
There isn't a "bomber" rank in the Marine Corps. There is, however, a Gunner. Its symbol is a bursting bomb. Gunner is also not a rank, but a title. This insignia is awarded to the highest ranking CWO in a weapons company.
The Marine Band logo is the words "The President's Own" under a graphic representation of the roof of the White House. Band members wear rank with a lyre in the center.
For the US Army, it's a bronze oak leaf. The same insignia is used by Majors in the Air Force and Marine Corps, and by those holding the rank of Lieutenant Commander in the Navy and Coast Guard while wearing certain uniforms.
No
Majors in the military typically wear an insignia consisting of a gold or silver oak leaf. In the U.S. Army, Air Force, and Marine Corps, this insignia signifies the rank of major. The color and design may vary slightly between branches, but the oak leaf is a common symbol for this rank across many military organizations.
No
The rank typically associated with the gold leaf insignia in the army is that of a Major.
Lieutenant Colonel insignia is identified by a Silver Maple Leaf. In the US Army it is a cluster of silver OAK leaves. In the British army it is a crown and a single 'pip'.
Very basically speaking, the difference is one step in rank. While a Lt. Colonel is normally referred to a Colonel, a Colonel is sometimes to referred to as a "full bird colonel" to distinguish the difference. In the Army at least, a Lt. Colonel wears a clover leaf rank insignia (silver, I think) but a full Colonel wears an eagle insignia, hence the reference "full bird."
Insignia of rank
Insignia of rank
Gold leaf in military rank insignia signifies the importance and prestige of the rank. It is a symbol of honor, excellence, and authority within the military hierarchy.