Yup... There was indeed Mike!
https://bridgehunter.com/pa/york/bh74280/
Wouldn't be surprised if it was a WIBCo bowstring as it seems they pretty much "owned" York County.
Looks like a bowstring in the background on the right
A half-through Whipple.....on a grade....plus an inclined pony! Definitely a unique find.
First Whipple half-thru that I've seen.
...And you can see the College Ave. bridge in the background of that postcard photo!