Here are 3g's broad..Although not clear. iPod classic MC293,160GB,sliver.
337S3526 8702 N26P9U4 1011 ARM
APPLE 338S0445 78030 82 D780113
APPLE 338S0394 AICK0952 MAL
I can't find anything different with classic 2g's board(see pictures in 2g's hardware page).Apple's part number is 820-2437,also the same.