I went back down to southern Middlesex County and decided to go to the Chester Hose Co for their 2T22's noon blast. Now when I 1st pulled up the the firehouse there was a public works employee weed whacking but after I circled the block, he finished and I had the lot to myself. This is the last remaining mechanical siren in that area as about 2 miles down the road is Whelen's headquarters, and as expected their sirens are abundant in every other surrounding town (mostly 2016s).
https://www.youtube.com/watch?v=m9pV0tcCgfw