Mine is silver too, but can't be sure of the original finish. The keys were missing when I bought the car, so I had to reach through the trunk from the back seat and unbolt the catch plate with a long extension bit to open the trunk lid. Can't remember where it is now, must be a very safe place!
And as 'luck' would have it, the previous owner called me 2 days later to say he'd found the car keys hanging on a nail in his shop......