I am informed that this bridge was manufactured in Glasgow in Scotland by P & W MacLellan in 1898 and installed at Mayaro. It was transfered to Blanchisseuse  in 1955 and reassembled by 1956. So it is at least 112 years old. (Thanks to Simone for answering her own question, see comments)

Trinidad suspension bridge near middle of north coast

Silver suspension bridge over Marianne river at Blanchisseuse