Abandoned PNR Signal Box near Jose Abad Santos in Tondo, Manila. Old PNR Signal Box (Heritage Structure) (Manila). Also called “kaseta” in Spanish, it is a small structure that houses several levers that control the boom gates, mechanical semaphores, rail switches and others that keep the operation of PNR safe. It also had its own telegram in the olden days. These old signal boxes are just some of the PNR heritages that RIHSPI lobbies to be preserved. #RIHSPI

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