1/72 Altaya/IXO model, item N°6 in the "Combat Helicopters" series. - SAC Sikorsky MH53-E Sea Dragon, Helicopter Mine Countermeasure Squadron One Four (HM14), US Navy, Norfolk Naval Station, Virginia, USA.
Compare sizes with the Bell Iroquois !!!.
As for the SA321 Super Frelon, the main rotor blades mounting has to be carefully studied: the fixation plots are shaped so that a contrary mounting is unavoidable until you reworked them !! Look out !