If memory serves... have seen many and owned some of these in 1860 Colt .44 .
However, do not remember there being a Belgium made Remington model which would have a top strap over the cylinder top fully enclosing the frame and an octagon barrel. Hopefully, someone else will post if I am wrong.
Mostly produced in the 1960's, maybe very late 1950's to very early 1970's.
These were very good Belgium quality and became too costly so production went mainly to Italy.
Reference books I have do not list either a Colt or Remington.
There was a Centennial Arms Co. in Chicago. By the time I bought from them in the very early 1970's all the Colts & Remington's bought were Euroarms marked and made in Italy. Do not remember if this company was the importer of the Belgium guns. Again, hopefully, someone else will post more info.