Twin Cummins 6BT 210hp with gears

They are in the boat. Original motors, no blow by 900 original hours. Moving up in HP so need to sell ASAP They are running, need paint , some seals, and love. The owner can get them out of the boat and shipped. They come with everything but the panels, which aren?t Cummins, they are just general boat panel. The gears are 2:1 ratio, but the tags are difficult to read. Not ZF, but unsure what they are.