Go to Proofhouse.com
Dozens of companies made 1911s, and there is no commonality to Serial numbers. If you 1011 is a Colt, you can contact colt customer service.
Impossible to answer without knowing who made it. Even then, data may not be published.
Must have the maker's name to attempt answer
Usually.
The last 4 digits in the Hull ID determine that. Example ABC12345C393 ABC would be the manufacturer ID Code 12345 would be the hull serial number C would be the month (March) 3 is the year built 93...