Older FreePBX 15.0.23.17 installation

I am particularly trying to install FreePBX 15.0.23.17 version but on the following link it is very difficult to identify this version
https://downloads.freepbxdistro.org/ISO/
can you help how to identify FreePBX 15.0.23.17 ?

You may install the ISO file for v15 from there and then get your server on the version you need (within v15, obviously)