It has the MG ring for the assistant driver (only 1 in 3 had this feature). I will have to look for the David Doyle book on the DUKW, it is somewhere in the 'library'.
And , the following nine manuals/pamphlets go with this DUKW
TM 9-802 2 1/2 TON, 6 x 6 AMPHIBIAN TRUCK (GMC DUKW-353)
TM 9-1802A POWER PLANT FOR 2 1/2 TON AMPHIBIAN TRUCK 6X6 (GMC DUKW-353) AND 2 1/2 TON TRUCK 6X6 (GMC)
TM 9-1802B ORDNANCE MAINTENANCE POWER TRAIN FOR 2 1/2 TON AMPHIBINAN TRUCK, 6X6 (GMC DUKW-353)
ORD 7-8-9 ORDNANCE SUPPLY CATALOG (SERVICE PARTS CATALOG), TRUCK 2 1/2 TON, 6X6 AMPHIBIAN
TB 9-802-FE1 EMERGENCY FIELD MAINTENANCE, TRUCK, AMPHIBIAN, 2 1/2 TON (GMC DUKW-353)
TB 9-1802A-1 FITS, TOLERANCES AND WEAR LIMITS FOR GMC MODEL '270' ENGINE
TB 9-1859-6 TIME SCHEDULE GUIDE, 2 1/2 TON 6X6 AMPHIBIAN TRUCK (GMC DUKW-353)
X 4412A (RESTRICTED), GMC 270 ENGINE, TROUBLESHOOTING AND DIAGNOSIS
DUKW AMPHIBIOUS OPERATION
In the movie "Revenge of the nerds, II" there is a DUKW that comes through the surf to deliver supplies to the rebels. This is that DUKW, the shark teeth have faded a good bit, but they are still there.