Part of what gives this film its somewhat unique look is the film stock that was used. According to IMDB, this was shot on Agfa XT320, which is a fairly fast/lower contrast film that's no longer available... hence the somewhat coarser grain/detail.
I'm familiar with Agfa products from still photography classes, but don't think I was aware they also made motion picture film prior to looking at this. According to Wikipedia, Agfa began making commercial film in 1936, though they have since discontinued their motion picture stocks.
Some other films shot on Agfa XT, from here:
Edited by ADU - 9/19/12 at 3:35pm
Agfa was one of the first higher-speed stocks to incorporate a T-grain-type design into one of its layers. This was one reason why the XT-320 was so popular when it came out -- many people thought it was less grainy than 5294, the 400T Kodak stock available. Plus it had a wider exposure latitude (it was a lower-contrast stock.) For example, the last act in the warehouse in "Roger Rabbit" was shot on Agfa XT-320 because Dean Cundey did not want to use '94 (he shot most of the movie on 5247 125T).
It was not as edge-sharp as Kodak and had a brownish cast with colder blacks (and less black blacks). It reproduced greens lighter, which is why some people used it. Later Kodak stocks were definitely finer-grained.
The South Seas nightclub scene in "The Rocketeer" was shot on Agfa XT-320 to handle the blue-green color scheme.
It really helped to overexpose Agfa, which solved the problems with the blacks and grain, and added some snap back into the image. This is one reason why David Watkin used the high-speed Agfa outdoors in the sun for "Out of Africa" but medium-speed Kodak 5247 at night -- he was overexposing the Agfa so it wasn't that much faster than the Kodak anyway, and the Kodak had better blacks.
Other examples of Agfa movies:
Mountains of the Moon
Hamlet (Mel Gibson / Zeferelli version)
Gorillas in the Mist
The Mission (except for day exteriors on 5247)
Robin Hood: Prince of Thieves
A Fish Called Wanda
Life is Sweet
Honey I Shrunk the Kids
a few parts of "Last of the Mohicans"
Besides the softness and low-con look, I tend to think of Agfa has having warm brownish skintones but a powder blue bias to the shadows.