It may be a .38 Super, but it's not a Super .38. Super .38s were so marked on the slide. If it really is a 1911 and not a 1911A1, it's pre-WWI. A commercial 1911 would be marked "Government Model," not Model 1911.
Originally Posted by viking6
Colt serial numbers for military pistols began with "NO." Colt serial numbers for commercial pistols had a C prefix before WWII, and a C suffix after WWII, until the advent of GCA '68.
Pictures would help mightily in this case.
Author, The M1911 Complete Assembly Guide,
The M1911 Complete Owner's Guide,
The M14 and M1 Garand Complete Assembly Guides
and The AR-15 Complete Assembly and Owner's Guides