I've been in contact recently with park rangers trying to restore a SoundMaster 125 at Rock Creek state park in Jasper County Iowa that has been the subject of several threads on here in the past. It appears virtually all the siren's internal components are failing/eroding and despite repair attempts going on since last July, the siren still freezes up or malfunctions.
In an additional spate of bad news, a similar siren located in Oakland Acres Iowa just off Highway 6, which I believe was also discussed on this board in the past has also malfunctioned and has now been out of commission for several months while the city council has been contemplating replacing or repairing the siren, whichever is the most cost efficient. It's the city's only siren so it's fate may be known soon.