1965 Dodge Dart Charger

It's the electric washer system. Was part of an option package.

Re the tags, did the assembly workers put it on the car or was that part of the dealerships "prep work"? Or did the assembly line workers just threw it into the glove compartment?

Because the tag itself is pretty much in the shape of the bag, I think you're correct that it's for older model cars.

What does the owner's manual say about operation of the windshield washers? Do you have the floor button pump style or the push-in at the wiper switch electric variety. Because the w/s reservoirs were translucent plastic, it became much easier to determine the fluid level and Chrysler's hope was that it would be self-explanatory to the car owner/user. That wasn't always the case, hence the addition in later years of an "idiot" light in the instrument panel to warn drivers when the reservoir was running low.