I think 1966 is in the ballpark for this fridge.  Definitely near the end of turquoise as a color option.

I wouldn't be surprised if that is the original drawer in the bottom.

I think it's the original drawer, but the solid shelf that fits over it seems to be missing (unless it's an opaque glass that doesn't show up in the photo).

I agree that the handles were likely specific to less expensive manual freezer defrost models.

These are good refrigerators with true zero degree freezers, and they operate quietly.  Yours is the 1966 version of my 1957 that's the same size. 

The freezer is a cinch to defrost, particularly if you have a vintage electric defroster (a heating element with a cage around it)  to speed up the process.  Set it, forget it, and come back in about 45 minutes to an hour.  The drain in the bottom of the freezer routes melted frost down to the collection pan under the fridge.  Just remove any chunks of ice that have fallen or loosened, wipe out the cavity, re-stock the freezer and turn the fridge back on.  I'm usually done in less than an hour, and only about 15 minutes of that is hands-on.