Photo taken by Douglas Butler in September 2017
BH Photo #401826
I kind of figured the present 1954 Woods Memorial bridge replaced the previous 1906 Scherzer bascule bridge.
Douglas, there's a concrete arch at this location, and you're on the Mystic River when the bridge is over the Malden River, which is further east.
This probably was the predecessor to the Woods Memorial Bridge.
Good job on finding more Scherzer brochure images, though.