Saw this and I don't know whether it qualifies or not

[paulingzubat]

@NianticTintino

If the ornaments are unique compared to the rest of the buildings, however, or of historic importance, they can be eligible.

I somewhat agree with Eli. If it were a plaque explaining the bridge, I’d lean towards it being a duplicate. The insignia though seems to tell a broader story of infrastructure works of that time. That reminds me of postbox ciphers though, I guess its rarity might also be a factor.