Im certain the buckle in the game gold or a brass color, not silver.
There isnt a single shot of the buckle being silver in the entire game.
On a real buckle, the way you can tell if its silve is by looking at the brightest area where light is reflecting off of the buckle.
If it's a silver buckle reflecting yellowish light, it will have alot more white reflecting off of it than if it was made of gold or brass.
Anyhoo, I got my buckle today. I ordered a used gold buckle which has enough weathering to make it look a bit brassy without that gaudy bling feel.