Andres Restrepo posted this photo on Myaviation.net and added the following details:
Ex-Inair Panama Douglas DC-4 (should read DC-6 -webmaster) at Cali-Jose Pardo Llada Amusement Park, Colombia (November 2nd, 2005); "this old DC6 was donated by the Panamanian dictator Omar Torrijos to Mr. Jose Pardo Llada in 1977 or 1978; this plane wore the original livery until a few years ago when it was painted on these colors"
The photo was published with permission by Mr Restrepo, for the sake of researching its full identity.
Nils Rosengaard wrote the following:
Alexandre of the Aerotransport database holds a different theory:
David Ruddlesden published this photo & update on Facebook in March 2020-
David wrote: "Douglas DC-6B HP-641 (ex Panama Air Force FAP401) at the Parque del Avion (!) in Cali, Colombia (GPS 3.4691, -76.5179), in reasonable condition although with work still to be done on the engines (!), taken on Aeroprints AT1817 tour, on 31 Oct 18"
And: "Listed in Bob Ogden's guide with this c.n and previous ids N6521C HP-360 N6521C LV-PXR LV-IEN N6521C."