This is an attempt to mimic 15.7(3)M9 but formatted incorrectly, either through human error or obfuscation.
: Denotes a "Universal" image that includes all features (Data, Security, and Unified Communications). The k9 indicates the inclusion of strong cryptography/encryption features like IPsec and SSL VPN. c1900-universalk9-mz.spa.157-3.m9.bin
Integrated Services Routers (specifically models like the 1905, 1921, or 1941). universalk9 This is an attempt to mimic 15