There were 3 different models of the Remington.
The Remington-Beals Army Model REvolver was the first.
Made in 1861-1862 its chief feature is the barrel threads are completely covered by the frame leaving little gap in the area.
The cylinder does not have safety notches.
The next pistol was the Remington 1861 Army Revolver.
The frame was cut away to reveal the barrel threads. The loading lever was relieved on the top so the cylinder pin could be withdrawn with the loading lever still up.
This "improvement" allowed the cylinder pin to move forward causing the cylinder to fall out.
It was fixed by installing a small screw in the loading lever to block the cylinder pins forward movement. This made it necessary to lower the loading lever to remove the cylinder.
Cylinder notches are not on the early production guns but were added to the later made guns.
The third model is the Remington New Model Army which is the one most often reproduced in Italy.
The barrel is 8" long, the cylinder has safety notches.
Serial numbers start in the 15000 range.
The barrel markings say:
PATENTED SEPT. 14, 1858/E. REMINGTON & SONS, ILION, NEW YORK, U.S.A./NEW MODEL
The government acceptance is on the left grip (initials in a cartouche) with sub-inspectors marks on some other parts.
About 106,000 of these were made.
Flayderman's Guide about 7 years ago said that in good condition it was worth $700. In Fine condition its value was $2,500.