the serial number is not a remington rand serial number. it is a colt commercial 1911. you have a rem-rand slide on a colt frame. sorry.
With the serial number that you have provided,your Remington Rand model 1911 was made in the year 1943.
1919
1912
by serial no
Early 1912
Manufactured 1916
Manufactured 1931
Manufactured 1919
Your 1911A1 pistol was made in 1944.
Early 1911, probably January.
Made in 1950 but it's a Ruger Mark I.