Bruce R wrote:

Never heard of this one before. Obviously an operational a/c, when and
where did it serve and what was it's function??

It's a Douglas EB-66. The B-66 was a de-navalized and modified version of
the navy's A-3. It served in several versions, as a tactical light bomber
(A-26 replacement) as the B-66, as a reconnaisance plane as the RB-66, an
electronic countermeasures plane as the EB-66, and later as a weather
observation aircraft, the WB-66. The EB-66 and RB-66 were used over
Vietnam, the RB-66 also over Cuba during the Cuban missile crisis.

The first planes of this family were delivered to the US Air Force as
reconnaisance RB-66, the last ones were phased out by 1973.