It’s somewhat unusual to find a dated O & M (city Operations and Maintenance) stamp in any case, but especially rare in the southern reaches of the Urbandale neigborhood. This one is near the dead end (south of Horton, north of I-496) on the west side of the street.

Sorry for the poor photo. I’m still not used to my new phone. It’s delightfully tiny but a bit hard to handle for photographs.