While Symbian became open source near its end-of-life, the specific proprietary apps (Nokia Maps, Nokia Browser, proprietary codecs) included in the ROMs are still copyrighted. Many file-hosting sites have purged these files to avoid copyright strikes, leading to the current scarcity.
Not all S60v1 ROMs are interchangeable. Here is a quick reference table: s60v1 rom download
This is the official operating system package released by Nokia. In the Symbian community, this is often referred to as the "Flash File" or "Firmware." It contains the operating system, the User Interface (UI), and the default applications (Gallery, Calendar, Messaging). While Symbian became open source near its end-of-life,
An old but trusted group of Symbian archivists. Their repositories (often hosted on Google Drive or Mega) contain .mcu , .ppm , and .image files – the raw components of an S60v1 ROM. Here is a quick reference table: This is