Interesting. Looks like the windshield from a WWI ambulance.
That is a Cambridge Windscreen:
Metz used those. I believe they were factory items.
You can see "Hamilton" on the raised open hood panel. Wonder if this is the same outfit:
They mention that their first truck was a Brockway, but this excerpt is interesting given the current discussion:
" It was hard to acquire fire trucks at this time because the First World War was in progress and just when a truck was ready to be delivered to the fire commissioners the army would take it for their needs. This too was the reason our first fire trucks were painted army olive drab which the members seemed to like."
I wonder when the photograph was taken? The truck in front of the Model T looks to be a 1946-52 Ford, so I assume the Model T was not a "active" firetruck at this point.