Can't see the pump but the base looks like a Jabsco. If it is a Jabsco, it will have a label right on top of the macerator motor showing the model number.
Pretty sure its a Jabsco, the motor cover just snaps in. Pull up and then you will see the motor. As High Wire stated you should see a label on the motor. Also, the duckbill is easy to change as its at the waste hose flange right at the motor.
Good Neighbor would volunteer to do the manual labor, particularly one with vast anchor winch experience. Too there may be a six pack of AA somewhere in the bowl.:lol::lol: