Federal Sign and Signal Thunderbolt 1003 (4/5 PORT) Pomaria, South Carolina, 7/20/24

SCSM part 3 While Daniel and Luke were in Wisconsin for sirencon, they went to another enthusiast's house to go pick up a few siren parts, including this FS&S era 1003. It was swapped to run on a 4/5 port chopper for the meet. Enjoy!