This stamp is actually on the grounds of Eastern High School, on a curb cut in front of the school. There are lots of similar ones on the walks around the school as well as on the public sidewalks on Marshall Street and East Saginaw Street. They must date to when the school was built.

The building was constructed to house Pattengill Middle School, which became a “biotechnical” magnet school called Pattengill Academy when it moved there in 2007. It had previously been located on Jerome Street next to Eastern High School, but like so much of that neighborhood it ended up in the hands of Sparrow and was demolished to build a parking lot. Its original name when it opened in 1921 was East Junior High, but the following year it was renamed Pattengill Junior High.

Approaching Eastern High School from the south, via the sidewalk that extends from the dead end of Horton. (The stamp isn’t visible here. I just liked the pretty sky.)

Pattengill closed in 2013. Meanwhile, the original (1928) Eastern High School got sold to (guess who?) Sparrow, so in 2019, Eastern High School was moved into the former Pattengill building.