The CLM replaced the SRN. I replaced the Thunderbolt. The CLM is a Fire siren. I am a Tornado siren The Thunderbolt was replaced in 2021 by me. The SRN got replaced by a CLM in 2010. The SRN's batteries exploded The T-bolt's chopper and rotator died The CLM got restored and put up when I got put up. The T-bolt was installed in 1957 The 2001 was installed in 1999
