[arcticap]

mykeal recently posted about how the original Remington-Beals 1858 revolver didn't have any safety slots milled into the cylinder. The slots were an innovation that were added in late 1862 to the 1861 Model production series. Some Euroarms resembled Beals models so perhaps they were trying to be more authentic by not having functional safety notches, but not leaving them totally off the cylinder either.
The Beals models had a longer threaded section of the barrel in front of the cylinder which caused them to bind up with fouling more easily. That section of your revolver isn't shown in the photo.

The Remington was a single-action, six-shot, percussion revolver produced by E. Remington & Sons, Ilion, N.Y., based on the Fordyce Beals patent of September 14, 1858 (Patent 21,478). The Remington Army revolver was large-framed, in .44 caliber, with an 8 inch barrel length. The Remington Navy revolver was slightly smaller framed than the Army, and in .36 caliber with an 7.375 inch [Beals Navy 7.5 inch] barrel length. There were three progressive models; the Remington-Beals Army & Navy (1860–1862), the 1861 Army & Navy (1862–1863), and the New Model Army & Navy (1863–1875).[2] The three models are nearly identical in size and appearance. Subtle but noticeable differences in hammers, loading levers, and cylinders help identify each model. The 1861 Remington actually transitioned into New Model appearance by late 1862, slowly transforming throughout 1862, due to continual improvement suggestions from the U. S. Ordnance Department.[3][4]....
....Another innovative feature, (first appearing in late 1862 in the 1861 Model production series) was safety slots milled between chambers on the cylinder.....

http://en.wikipedia.org/wiki/Remington_Model_1858