Here is a video of the noon test mode on the STH-10A I restored and installed. Can be seen in this thread: https://airraidsirens.com/forums/viewtopic.php?t=15919
Also, the remaining model 2 at the other station can be heard, which I installed in the summer of 2014. The STH-10 is about 1.3 miles away, and the model 2 is at .3 miles. You can hear how much further the STH-10 carries vs the model 2, as it is louder even at a much greater distance. Hopefully I can get that model 2 upgrade to a larger siren like I did with with the other station. Video is just audio, with a picture of the install. I will get a closer recording in the near future. I also have a recording of the fire call mode, but it isnt that great. I will see if I can get a better one or edit it or something.
https://www.youtube.com/watch?v=a0F7oH90HUs