Not very successful, only found two 508s. One of which was a new location though.
The new location on Jefferson Street:
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr
The one on Armory Street. This siren replaced a Thunderbolt 1000:
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr
508 siren by freebrickproductions, on Flickr