Sure looks to be an SB-B/G-I.
You can restore the bridge to it's original black and gold. I did a black bridge on a Vibracell the ID10T sanded the electroplating off of it using hi-temp black enamel. After it cured overnight I baked it at about 300° for about an hour to harden it. Just make sure you have good ground on the underside of the bridge, where the intonation screws go through the bridge and where the strings go through the bridge. The fool tried to tell me he "aged" the bridge. Wrong, the moron sanded all the way down to the copper underplating.
I'm pretty sure it's the same as my CSB-B/G. The bridge base was black and all the rest was gold/brass. Just checked and the truss cover on mine was also brass-ish aluminum and had a brass nut.
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