The most prominent marking on the slide is the Remington Rand manufacturer’s notation. Unlike Colt’s elaborate pony logos, Remington Rand kept it strictly utilitarian.
This "broken" spelling of REMINGTON is a key authentication feature. Fakes often incorrectly spell it as a single continuous word. The spaces were due to the roll stamp die splitting the name to fit the slide’s contour. remington rand 1911a1 markings
These appear on frame and slide:
Later Remington Rand frames (1945) often have an extra mark on the left side above the trigger: the word "NOISE". This was an assembly aid indicating that the noise (safety) spring was installed. The most prominent marking on the slide is