GRS_Type_2a_South_Raub_Ind_Oct2002__Brian_Solomon_235545 May 31, 2015 820 × 1224 Brian’s latest book: Classic Railroad Signals Old GRS upper quadrant semaphore with Type 2A top of mast mechanism on CSXT’s former Monon at South Raub, Indiana. There’s lots more great signaling photos and detailed information in the book! Like this:Like Loading... Share this:FacebookEmailTwitterMoreWhatsAppLike this:Like Loading...