It turns out that the 300-600 blocks of North Clemens Avenue are a trove of contractor stamps I haven’t featured yet. I jotted down several on my last walk up that way and returned for one of them today, on the east side between Fernwood and Saginaw. It was my first walk of the year with no coat, since was in the mid-sixties outside. One house I passed had its entire front yard covered with crocus flowers, and a few bees were making the rounds. It was amazing and a bit unsettling to see this early in March.
So here is the stamp, the only one of its kind I have found so far. Unfortunately, I haven’t been able to turn up any information about G.R. Montague. Nothing is showing up in old Lansing State Journals. My next approach if the stamp includes a person’s name is usually to start checking Find A Grave, but FindAGrave.com has been down all evening. I’ll try again tomorrow.