Yes. This is the one of two 6900’s that got the AIR RAID SIREN on the cab roof. In 1979 UPRR experimented with every air horn available as their dying fleet of Leslie horns weren’t doing the job. Can you imagine being in the cab and activating the SIREN over your head? I’ll bet every hogger only tried it ONCE! MINT CONDITION! I believe Athearn did include SIREN sound files?