Gaumont British

Background
Gaumont British was founded in 1902 by Isidore Ostrer, acquired Leon Gaumont's control of the company. It was filmed pictures with Gainsborough Pictures Corporation (1924).

1st Logo (1910s)
Visuals: On a tan background, there is a stylized black daisy in a circle with "G.B" inside.

Technique: Unknown.

Audio: Possibly none.

Availability: You can seen the print logo at http://www.gaumont-british.co.uk/.

2nd Logo (1930s)
Visuals: A still, updated version of the "GB" sunflower appears with some shiny sun rays in the background.

Technique: None.

Audio: The start of the movie's soundtrack.

Availability: It can be spotted on some DVD prints of films from the era, like 1933's The Ghoul, starring Boris Karloff.

3rd Logo (May 8, 1931)
Visuals: On a marble background, there is a black tube with a white outline with the Gaumont emblem at the lower right corner of the screen. Inside the tube reads "A Gaumont-British TALKING PICTURE".

Technique: None.

Audio: The end of the movie's soundtrack.

Availability: So far, it is seen on No Lady.

4th Logo (October 27, 1935-1941?)
Visuals: Stylized "GB" in circle.

Technique: None.

Audio: None (or the film's soundtrack).

Availability: It can be found on GB films of the period, i.e.: The Tunnel (1935) and High Flyers (1941).

5th Logo (1937)
Visuals: "Gaumont British" in corporate font?

Technique: Unknown.

Audio: The opening theme to the film.

Availability: Seen on Young and Innocent.

6th Logo (1956)
Visuals: Just a simple fade-in and fade-out on a space background with "GAUMONT BRITISH PICTURE CORPORATION Presents" superimposed.

Technique: The fades and stars flying in the background.

Audio: The opening theme to the film.

Availability: Seen only on their last film: Supersonic Saucer.