Looks like one of those modified Warren trusses that was being talked about earlier on a Norfolk Southern bridge page.
This postcard made me laugh! Whoever printed it claimed this was the longest span in New York State. Its rivet connected, probably ca. 1915? Definitely newer than the 1886 built 288 foot span of the Raymondville Bridge.
http://bridgehunter.com/ny/st-lawrence/grant-road/
https://historicbridges.org/bridges/browser/?bridgebrowser=n...
Many of the "longest" and "oldest" claims on bridge postcards are dubious. My favorite is "The only Triple Bridges in the U.S." and yet I've found a half dozen side-by-side triples.