Date:
July 19, 1974
Location: Balcarce, Argentina
Antonio
Le Pere snapped these two photographs through the driver's
window of his car as he was proceeding along route 226
near Balcarce. A disc-shaped metal-looking flying object
approached the automobile and kept pace with him from
a position only a few hundred meters to his left. Le Pere
took the pictures through the rolled down window on the
driver's side of the car.

One of the two photographs taken by Antonio Le Pere in
1974.
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The other photograph (in black and white).
Source:
Wendelle Stevens (Credit: Cosmic View)
Summary:
Antonio Le Pere snapped these two photographs through
the driver's window of his car as he was proceeding along
route 226 near Balcarce.
July
19, 1974, at Balcarce, Argentina, disc-shaped metal-looking
flying object approached an automobile driven Sr. Antonio
Le Pere. It was near 18:00 hours when Le Pere noticed
the intruder keeping pace with him from a position only
a few hundred meters to his left, and barely 10 meters
above the ground, there. He slowed his automobile as he
worked on his camera to take a picture, before it started
climbing and flew away. Le Pere took the pictures through
the rolled down window on the driver's side of the car,
shooting over his left arm holding the steering wheel.
The object was of a coppery-brownish smooth finished reflective
material like metal, or something between a metal and
ceramic finish. It had a raised dome on the top surface
of the craft, and seemed to have a reddish glow either
on the rim edge or surrounding the rim very closely to
the ship. The strange machine flew a steady course and
was quite obviously under intelligent control. (from Stevens/Cosmic
View)
Source:
http://www.ufoevidence.org/cases/case875.htm